- Discuss - lists.centos.org

Mock Shell Arch Command
by Ryan Wagoner 04 May '10

04 May '10

I've successfully rebuilt Red Hat EL PHP 5.2.10 RPMs using mock on a CentOS 5.4 i386. I wanted to be able to build both x86_64 and i386 versions so I reinstalled my builder system with CentOS 5.4 x86_64. Now I can build the PHP RPM successful for x86_64, but i386 fails with the following during configure /usr/bin/net-snmp-config: line 43: net-snmp-config-x86_64: command not found For the commands I am using mock -r centos-5-x86_64 php-5.2.10-1.el5s2.src.rpm mock -r centos-5-i386 php-5.2.10-1.el5s2.src.rpm I went into the shell on the i386 build environment mock -r centos-5-i386 shell The contents of /usr/bin/net-snmp-config has arch=`arch` echo $arch | grep -q i.86 ...... if [ "$arch" = "x86_64" ] ; then net-snmp-config-x86_64 $* exit 0 fi When I run arch from the mock shell I get x86_64. Shouldn't it see the correct architecture inside of mock? I thought that was the point of mock so I could build both i386 and x86_64 versions on the same system. Thanks, Ryan

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iostat on multipath disks
by Wahyu Darmawan 04 May '10

04 May '10

Hi Experts, How can I get info for my disks on multipath disks? I mean, usually I use 'iostat' for internal disks, however I need to know status of my multipathig devices, cause I'm monitoring stress test for my application.. Thank you for your responses. Regards,

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Matlab vs. Octave
by m.roth＠5-cent.us 03 May '10

03 May '10

Oddly enough, there's a report on slashdot today, that Matlab doesn't have the code for 64 bit math, bu that "Octave, the free Matlab clone" does. <http://tech.slashdot.org/article.pl?sid=10/05/02/2038255> mark

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Upgrading to 2.6.32
by maillists0＠gmail.com 03 May '10

03 May '10

I want to upgrade a 5.4 box with the 2.618 kernel to a shiny new 2.6.32 kernel. Anyone done it? Is it possible? Are there gotcha's to watch out for? Any advice is appreciated. A link to a decent howto would be awesome.

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Read Processor ID
by premrajm＠digilink.in 03 May '10

03 May '10

Hi, On Centos is it possible to read the processor ID from any File ? Regards, Premraj M Disclaimer : This message is proprietary to Smartlink Network Systems Ltd. and is intended solely for the use of the individual to whom it is addressed. It may contain privileged or confidential information and should not be circulated or used for any purpose other than for what it is intended. If you have received this message in error, please notify the originator immediately. If you are not the intended recipient, you are notified that you are strictly prohibited from using, copying, altering, or disclosing the contents of this message. The company accepts no responsibility for loss or damage arising from the use of the information transmitted by this email including damage from virus. ______________________________________________________________________________ This email has been scrubbed for your protection by SecureMX. For more information visit http://securemx.in ______________________________________________________________________________

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Software Protection on centos
by premrajm＠digilink.in 03 May '10

03 May '10

Hi, I would like to have a software protection for my hardisk. I have some query regarding that (1) In Centos, is it possible to do a hardisk protection. Ex : Even if the hardisk is taken from a PC and used on another PC, it should not be executable. (2) Also if the entire binary of the source is mounted on a partition say /tmp, is it possible to make that mount point as protected, visible only after entering a password or similar to that. Regards, Premraj M Disclaimer : This message is proprietary to Smartlink Network Systems Ltd. and is intended solely for the use of the individual to whom it is addressed. It may contain privileged or confidential information and should not be circulated or used for any purpose other than for what it is intended. If you have received this message in error, please notify the originator immediately. If you are not the intended recipient, you are notified that you are strictly prohibited from using, copying, altering, or disclosing the contents of this message. The company accepts no responsibility for loss or damage arising from the use of the information transmitted by this email including damage from virus. ______________________________________________________________________________ This email has been scrubbed for your protection by SecureMX. For more information visit http://securemx.in ______________________________________________________________________________

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TCP Tuning/Apache question (possibly OT)
by Kwan Lowe 03 May '10

03 May '10

Hello All: I've been requested to add some TCP tuning parameters to some CentOS 5.4 systems. These tunings are for the TCP receive buffer windows: net.core.rmem_max net.core.wmem_max Information on this tuning is broadly available: http://fasterdata.es.net/TCP-tuning/linux.html http://www.speedguide.net/read_articles.php?id=121 Potential downsides are available: http://www.29west.com/docs/THPM/udp-buffer-sizing.html >From the above, the rmem size is a function of the number of listening processes times the size of the receive buffer. Apache can initially create a bunch of server processes (StartServers directive, for example). In our environment we may spawn off 50 or more httpd listeners. Does each listener allocate its own buffer or is the parent process the only one? The tunable seems innocuous but I am concerned about the impact to memory given that there will be many listener processes. We are running fairly tight already and because these are virtual environments in a cluster, adding a meg or so per listener can equate to multiple gigs across all the machines in the virtual host cluster.

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How to schedule for a repeated task?
by hadi motamedi 03 May '10

03 May '10

Dear All I need to schedule for a repeated task on my CentOS server, as the followings: -) Telnet to a remote node -) Issue a command -) Capture the output in a log -) Logout from Telnet -) Wait for a prescribed time interval -) Then redo , but append the subsequent output in just on file Can you please let me know which options do we have to write such a task? Thank you

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Re: [CentOS] how to find out promiscuous mode
by Les Bell 03 May '10

03 May '10

Vadkan Jozsef <jozsi.avadkan(a)gmail.com> wrote: >> How can I find out that someone is using it's network card in promiscuous mode in a subnet? << http://sourceforge.net/projects/prodetect/ Best, --- Les Bell [http://www.lesbell.com.au] Tel: +61 2 9451 1144

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is it possible to resive /var online?
by Rudi Ahlers 03 May '10

03 May '10

Hi all, Is it possible, safely, to resize /var while a server is running? I urgently need to resize a full 2GB /var on a running server which is located at a remote location where no one can get to it for 2 days? The system runs on lvm. I already moved /var/logs to it's own LVM partition but it didn't help at all so I think it's better to rather just resize it. Google searches suggest taking the server offline, or boot into single mode. But this won't be possible for another 2 or so days and I urgently need to install more software on the server. tia :) -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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Re: [CentOS] Sendmail Configuration Problem - 550 5.1.1 - User unknown Problem
by Wang, Mary Y 03 May '10

03 May '10

It's working now. I just commented out some of the FEATURE lines in sendmail.mc file. Mary _____________________________________________ From: Wang, Mary Y Sent: Saturday, May 01, 2010 6:21 PM To: 'centos(a)centos.org' Subject: Sendmail Configuration Problem - 550 5.1.1 - User unknown Problem Hi, I'm having this Sendmail configuration problem and stuck. I've been doing googling/reading posts and none of the solutions matched my problem. I'm doing some testing, and have been getting this 550 5.1.1 ....User unknown error when I send the email to my company's email address. When I send it to an external email address, such as yahoo, the message delivered successfully. Of course, I'm doing the configuration behind a firewall. I'm using a relay too, and I did declare the relay host in 'SMART_HOST' in the sendmail.mc file and have also recompiled it to produce the sendmail.cf. I also restarted the sendmail service. ---------------------------------------------------------------------------------------------------------------------------------------------------- telnet ana.boeing.com 25 Trying 134.51.151.114... Connected to ana.boeing.com (134.51.151.114). Escape character is '^]'. 220 ana.boeing.com ESMTP Sendmail 8.12.11.20060308/8.12.11; Sat, 1 May 2010 16:39:06 -0700 helo ana.boeing.com 250 ana.boeing.com Hello ana.boeing.com [134.51.151.114], pleased to meet you mail from:root@ana.boeing.com 250 2.1.0 root(a)ana.boeing.com... Sender ok rcpt to:mary.y.wang@boeing.com 550 5.1.1 mary.y.wang(a)boeing.com... User unknown Any ideas? I'm running on Sendmail 8.12.11 Mary

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DNSSEC
by m.roth＠5-cent.us 02 May '10

02 May '10

Well, folks, There's an article on slashdot, <http://tech.slashdot.org/article.pl?sid=10/04/30/1258234> Excerpt: ...the coming milestone of May 5, at 17:00 UTC at this time DNSSEC will be rolled out across all 13 root servers. Some Internet users, especially those inside corporations and behind smaller ISPs, may experience intermittent problems. The reason is that some older networking equipment is pre-configured to block any reply to a DNS request that exceeds 512 bytes in size. DNSSEC replies are typically four times as large. --- end excerpt --- I followed the link from the story to <https://www.dns-oarc.net/oarc/services/replysizetest>, a coordinating organization, and tried their test (as root): dig +short rs.dns-oarc.net txt And see that where I work, we're not ready. Is anyone following this, and/or have a HOWTO on enabling it for CentOS? mark (need to check this at home, too)

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boot Debian on a RouterStation Pro
by Jozsi Vadkan 02 May '10

02 May '10

Can anyone post a howto/doc, help about booting a Debian on a RouterStation Pro?:\ https://forum.openwrt.org/viewtopic.php?pid=108415#p108415 I still didn't manage to boot from it. Or any other "normal distro" :\ Thank you.. p.s.: a little more detailed howto:\

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Sendmail Configuration Problem - 550 5.1.1 - User unknown Problem
by Wang, Mary Y 02 May '10

02 May '10

Hi, I'm having this Sendmail configuration problem and stuck. I've been doing googling/reading posts and none of the solutions matched my problem. I'm doing some testing, and have been getting this 550 5.1.1 ....User unknown error when I send the email to my company's email address. When I send it to an external email address, such as yahoo, the message delivered successfully. Of course, I'm doing the configuration behind a firewall. I'm using a relay too, and I did declare the relay host in 'SMART_HOST' in the sendmail.mc file and have also recompiled it to produce the sendmail.cf. I also restarted the sendmail service. ---------------------------------------------------------------------------------------------------------------------------------------------------- telnet ana.boeing.com 25 Trying 134.51.151.114... Connected to ana.boeing.com (134.51.151.114). Escape character is '^]'. 220 ana.boeing.com ESMTP Sendmail 8.12.11.20060308/8.12.11; Sat, 1 May 2010 16:39:06 -0700 helo ana.boeing.com 250 ana.boeing.com Hello ana.boeing.com [134.51.151.114], pleased to meet you mail from:root@ana.boeing.com 250 2.1.0 root(a)ana.boeing.com... Sender ok rcpt to:mary.y.wang@boeing.com 550 5.1.1 mary.y.wang(a)boeing.com... User unknown Any ideas? I'm running on Sendmail 8.12.11 Mary

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32-bit boot CD for 64-bit install using kickstart
by Carlos S 02 May '10

02 May '10

Hi, I am using kickstart method for CentOS installation. The install is done using mirror site URL and not CD/DVD ISOs. However, the system is initially booted from 32-bit CentOS CD. When the install process starts I get errors as: - package rpm not found - abort/continue? - package lvm2 not found - abort/continue? - package grub not found - abort/continue? - ... - ... If I change install URL to 32-bit ISOs then everything works fine. Do I need to use 64-bit boot CD for this install? -- CS.

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Do you provide Sendmail help?
by Wang, Mary Y 02 May '10

02 May '10

Hi, Not sure if I'm on the right list. Do you provide Sendmail configuration help? Thanks Mary

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I need some help joining data from 3 MySQL tables, please
by Rudi Ahlers 01 May '10

01 May '10

Hi all, I am trying to display collective data from 3 MySQL tables: The query I have, so far, is SELECT c . * , COUNT( m.id ) AS `members` FROM `jos_mls_teams` AS `c` LEFT JOIN `jos_mls_teams_members` AS `m` ON m.teamid = c.id RIGHT JOIN ( SELECT u.name, u.lastvisitDate FROM `jos_users` AS `u` ) ON u.id = m.userid GROUP BY c.id LIMIT 0 , 30 But get the following error: #1248 - Every derived table must have its own alias A google search results suggested the alias should be put after the bracket. So, I change the code as follow, and move the *AS `u`* outside the right bracket: SELECT c . * , COUNT( m.id ) AS `members` FROM `jos_mls_teams` AS `c` LEFT JOIN `jos_mls_teams_members` AS `m` ON m.teamid = c.id RIGHT JOIN ( SELECT u.name, u.lastvisitDate FROM `jos_users` ) AS `u` ON u.id = m.userid GROUP BY c.id LIMIT 0 , 30 But then I get the error: #1054 - Unknown column 'u.name' in 'field list' Basically, I need to display all the data from the "*jos_mls_teams", total number of members linked to a user from the *"jos_mls_teams_members" (basically counting all the rows where the corresponding user's id is in the userid field. Then I want to display that same corresponding user's name & email from another table. Table structures to follow: CREATE TABLE `jos_mls_teams` ( `id` int(11) NOT NULL auto_increment, `userid` int(5) NOT NULL, `memberid` int(11) NOT NULL, `name` varchar(255) NOT NULL default '', `email` text, `area` text, `arealeader` varchar(150) NOT NULL, `founded` text, `herder` varchar(100) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=19 ; CREATE TABLE IF NOT EXISTS `jos_users` ( `id` int(11) NOT NULL auto_increment, `name` varchar(255) NOT NULL default '', `username` varchar(150) NOT NULL default '', `email` varchar(100) NOT NULL default '', `password` varchar(100) NOT NULL default '', `usertype` varchar(25) NOT NULL default '', `block` tinyint(4) NOT NULL default '0', `sendEmail` tinyint(4) default '0', `gid` tinyint(3) unsigned NOT NULL default '1', `registerDate` datetime NOT NULL default '0000-00-00 00:00:00', `lastvisitDate` datetime NOT NULL default '0000-00-00 00:00:00', `activation` varchar(100) NOT NULL default '', `params` text NOT NULL, PRIMARY KEY (`id`), KEY `usertype` (`usertype`), KEY `idx_name` (`name`), KEY `gid_block` (`gid`,`block`), KEY `username` (`username`), KEY `email` (`email`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=73 ; CREATE TABLE IF NOT EXISTS `jos_mls_teams_members` ( `id` int(11) NOT NULL auto_increment, `teamid` int(11) NOT NULL default '0', `userid` int(11) NOT NULL default '0', `leader` tinyint(1) NOT NULL default '0', `sysid` int(11) NOT NULL, `memberid` int(11) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=29 P.S. just to be clear, I want to eventually remove the name & email fields from the `jos_mls_teams` table, since Joomla uses the `jos_users` table for registration purposes and it's easier to use the built-in registration than trying to reinvent the wheel :) -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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how to build a centos kernel?
by Robert P. J. Day 01 May '10

01 May '10

a couple folks on the local mailing list were asking about the mechanics of building a kernel for a centos system, and they seemed to suggest that there were some intricacies involved as opposed to other distros. i've never tried it -- is there a trick or something? got a pointer to the canonical web page that has the directions? thanks. rday -- ======================================================================== Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ========================================================================

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Request for rss feeds
by john maclean 01 May '10

01 May '10

Who would be the right person(s) to ask for rss feeds on the main centos website? -- John Maclean 07739 171 531 MSc (DIC) Enterprise Linux Systems Engineer

1 0

CentOS 5.4 off-center on SuperMicro console
by Rudi Ahlers 30 Apr '10

30 Apr '10

I have a weird situation with a new installation of CentOS 5.4 x64, on a SuperMicro X7SBI server. The server has a <a href=" http://www.supermicro.com/products/motherboard/Xeon3000/3210/X7SBi.cfm" target="_new">SuperMicro X7SBi motherboard</a>, board ATI ES1000 and Core2Quad Q9505 CPU. The kernel is When I login to the console, using a "17 CRT monitor (haven't tested others), the screen is off-center to the right. This happens as soon as the boot loaders gets to: "waiting for driver initialization" Below are asome photos to show what happens. http://blog.softdux.com//everything-todo-with-linux/centos-5-4-off-center-o… http://blog.softdux.com//everything-todo-with-linux/centos-5-4-off-center-o… http://blog.softdux.com//everything-todo-with-linux/centos-5-4-off-center-o… Other Linux distro's, including Fedora Core 11, FC 12, Ubuntu 9.10 and OpenFiler 2.3 works fine though. The only thing I can think of is the video driver, but I don't have X installed, so it can't be that. And I've reinstalled CentOS 3 times already thinking I did something wrong with the installation. It's not the monitor, since I have another CentOS 5.4 server, running on an Intel motherboard that looks normal with this setup. They're connected to the same monitor via a KVM switch. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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Reverse engineering USB devices
by Stephen Harris 30 Apr '10

30 Apr '10

I'm pretty sure this is the wrong list, but maybe some clever people here can redirect me... I have a "RCA RS2100 Bookshelf Audio System" http://www.woot.com/blog/viewentry.aspx?id=2744 This is radio/CD/mp3 player... PLUS it can stream audio wirelessly. You plug a USB device into your PC and you can remote control what gets played from the RS2100 remote control ("Wireless Musiclink"). BUT only with Windows Media Center. When I plugged the device in it appears to look like 3 devices; a HID, an audio device and something else I can't remember (I'm not at that machine at the moment). My feeling is that the HID is used to inject commands from the RS2100 (eg "play track <x>"), the audio device is for streaming and the third device is feedback for the remote display. The question I have... how can I reverse engineer the protocol used so that I can make this work on my CentOS machine? (I don't want to run a Windows instance just for remote audio!). Any hints, tips, pointers etc much appreciated. Thanks! -- rgds Stephen

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need help: about remove space
by adrian kok 30 Apr '10

30 Apr '10

Hi all I have big file as below and would like to know how many line eg: wc -l file but can't figure out how to know If I type wc -l file, I only get the 1023 but it includes the space When I use cat file | tr -d "\r \n". it gives me "adrian alice......" I need it as fileB and then wc -l fileB. Thank you so much file ==== adrian alice Patrick file B ====== adrian alice Patrick

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C5: correct place for routing scripts?
by Kimmo Koivisto 30 Apr '10

30 Apr '10

Hello I have several Centos 4 and Centos 5 servers. Because of the nature of the environment, there are some static arp entries made with arp command and then source routing made with "ip rule/ip route" -commands. Those commands are now placed at /etc/rc.d/rc.local which is bad: if server is rebooted, those commands will be done correctly but if administrator restarts network with "/etc/init.d/network restart", source routes will disappear. RedHat/Centos qualified admin knows only about network restart init script, so I try to avoid doing any hacks. I could edit the init script (/etc/init.d/network) but changes could disappear with updates. So, what is the correct place for different commands (arp, ip, whatever) that is executed (a) once when network started (b) once when network stopped (I don't need but nice to know) (c) once per every interface (I don't need but nice to know) Best Regards, Kimmo

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NFS automount failure
by Trevor Cooper 30 Apr '10

30 Apr '10

I'm having a problem with automount (autofs) from a server running CentOS 5.4 to clients (example is CentOS 5.4). Client pulls automount maps from NIS. THIS particular server is also used for login so it is NIS bound as well (other servers are NOT). ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ NIS Server Side... (content shortened) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ $ ypcat -k auto.master | sort | grep auto.mdkm1 /storage/mdkm1 auto.mdkm1 --timeout=600 $ ypcat -k auto.mdkm1 | sort 1 137.110.179.254:/mdkm1/1 . . . 10 137.110.179:254:/mdkm1/10 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ NFS Server Side... (content shortened) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ $ cat /etc/exports /mdkm1/1 ###.###.172.0/25(rw,sync) ###.###.179.192/26(rw,async) . . . /mdkm1/10 ###.###.172.0/25(rw,sync) ###.###.179.192/26(rw,async) $ cat /etc/fstab /dev/MDKM1/MDKM1-1 /mdkm1/1 ext3 defaults 1 2 . . . /dev/MDKM1/MDKM1-10 /mdkm1/10 ext3 defaults 1 2 # mount /dev/mapper/MDKM1-MDKM1--1 on /mdkm1/1 type ext3 (rw) . . . /dev/mapper/MDKM1-MDKM1--10 on /mdkm1/10 type ext3 (rw) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ NIS/NFS Client Side... ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ $ cat /etc/auto.master | egrep -v "^#" /misc /etc/auto.misc /net -hosts +auto.master # service autofs status automount (pid 3714) is running... $ ls /storage/mdkm1/1 kmdev lost+found $ ls /storage/mdkm1/10 <--- wait here forever [CTRL-C] to abort ls: /storage/mdkm1/10: Interrupted system call *NOTE: Above command never completes and will hang the shell from multiple clients. # mkdir -p /mnt/mdkm1/10 # mount -t nfs ###.###.179.254:/mdkm1/10 /mnt/mdkm1/10 $ ls /mnt/mdkm1/10 kmdev lost+found # umount /mnt/mdkm1/10 NOTE: During mount/umount the NFS server logs show the requests for the automount of mdkm1/1 AND the manual mount of mdkm1/10. The server log never shows an attempt to mount mdkm1/10 in the 'stalled' automount attempt. For example... Apr 27 13:14:50 rilkm01 mountd[8002]: authenticated mount request from ###.###.172.70:730 for /mdkm1/1 (/mdkm1/1) Apr 27 13:15:24 rilkm01 mountd[8002]: authenticated unmount request from ###.###.172.70:771 for /mdkm1/1 (/mdkm1/1) Apr 27 13:16:17 rilkm01 mountd[8002]: authenticated mount request from ###.###.172.70:785 for /mdkm1/10 (/mdkm1/10) Apr 27 13:16:31 rilkm01 mountd[8002]: authenticated unmount request from ###.###.172.70:794 for /mdkm1/10 (/mdkm1/10) I've restarted the Server NFS services, Client autofs services AND the systems as a whole multiple times to no avail. Any ideas? Thanks, Trevor Cooper -- Trevor Cooper, M.Sc. Data Systems Programmer / System Administrator University of California, San Diego Multimodal Imaging Laboratory 8950 Villa La Jolla Dr., Suite C101 La Jolla, CA 92037 Phone: (858) 534-8259 Fax: (858) 534-1078

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Xenserver installation problem
by Georghy 29 Apr '10

29 Apr '10

Hi all, I'm trying to install xenserver on a 64bit processor server but I'm experiencing an error, take a look : http://img641.imageshack.us/i/capturebg.png/ what should I do ? -- Cordialement, / Greetings, Georghy FUSCO

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how to reroute all ADSL traffic via another server on the internet?
by Rudi Ahlers 29 Apr '10

29 Apr '10

Hi all, Does anyone know, if it's possible to reroute all (i.e. HTTP / FTP / DNS / SMTP / POP3 / IMAP / etc) from an ADSL connected machine via another server, which is currently hosted with IS and has full internet access? i.e. Can I setup another machine, on a different public IP than the dynamic ADSL IP as default gw? OR do I need todo something on that machine to work as a router for such a setup? Both servers in this case is CentOS linux, but I'm sure that won't make a big difference? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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vmware-server-console not installed
by Agnello George 28 Apr '10

28 Apr '10

I had installed the vmware server ( VMware-server-2.0.1-156745.i386 ) on my CentOS 5 box how ever i am not able to to find the command vmware-server-console . Do i need to install that RPM separately . Thanks -- Regards Agnello D'souza

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X11 problem with remote login via SSH
by fred smith 28 Apr '10

28 Apr '10

HI all! Strange problem that began occurring in last few weeks. Centos 5.4, up to date. I sometimes log in remotely via ssh using "ssh -X" and read mail via mutt. Now and then I want to use balsa instead. This has always worked (for years) though it's kinda slow... but in the last few weeks it has begun failing and spewing errors like this, repeatedly, apparently forever until I enter ^C: $ balsa Bonobo accessibility support initialized GTK Accessibility Module initialized X11 connection rejected because of wrong authentication. ** ERROR **: Accessibility app error: exception during registry activation from id: IDL:Bonobo/GeneralError:1.0 aborting... It happens from two different linux boxen (one running Fedora 12, the other running Centos 5.4) so I gather it's something weird on the host rather than the client. BTW, it works fine when I'm logged in to to the host's X11 GUI directly from the machine. I've got no clue, can any of you shed any light on this please? Thanks in advance! -- ------------------------------------------------------------------------------- .---- Fred Smith / ( /__ ,__. __ __ / __ : / / / / /__) / / /__) .+' Home: fredex(a)fcshome.stoneham.ma.us / / (__ (___ (__(_ (___ / :__ 781-438-5471 -------------------------------- Jude 1:24,25 ---------------------------------

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PAPI + perfctr on CentOS 5?
by Eduardo Grosclaude 28 Apr '10

28 Apr '10

Has anyone succesfully compiled a PAPI+perfctr-enabled kernel? I've been mixing and matching instructions from the PAPI distribution and those from CentOS wiki to no avail. TIA -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina

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Re: [CentOS] [GLUG-tech] Re: how to reroute all ADSL traffic via another server on the internet?
by Rudi Ahlers 28 Apr '10

28 Apr '10

On Wed, Apr 28, 2010 at 4:19 PM, zerlgi <zerlgi(a)gmail.com> wrote: > Probably the easiest VPN to set up, but not terribly secure, is VTun. > > If you use (horrors) PPTP, then windows already has a client for it. > .. openVPN also has a nice Windows client that can be run as a service > at startup or called on demand. > .. openVPN supports multiple tunnels (one per .cfg file) > and can allow/disallow client-to-client traffic (something you'd > probably want to do) > ... so that if you have several companies connecting as clients to > your server (traffic redirector) > then they wouldn't be able to travel back down the VPN to a different client. > > ... in terms of implementation. e-box has one of the easiest OpenVPN setups. > it provides a self-extracting installer file to windows clients that > includes the configs and the client application. > Linux folk should be able to figure out where stuff goes. > (/etc/openvpn /usr/local/etc/openvpn) > Unfortunately I can't download & install OpenVPN on that box, so this won't be an option. Thanx for all the suggestions though. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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Delivery failed
by jcasale＠activenetwerx.com 28 Apr '10

28 Apr '10

1 0

Total Threads used in a system
by Jatin Davey 28 Apr '10

28 Apr '10

Hi I know we can get the total number of processes running in the system using the 'ps -A' command but is it possible to get the total number of threads running in the system ? Is this information exposed using any of the MIB's ? Thanks Jatin

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Kernel Or Hardwar e
by cahit Eyigünlü 28 Apr '10

28 Apr '10

i have seen many times the given error, there was no log about error. Beside this my machine never uses swap i realize that when i have last 500 Mb ram it get this error and after using 5Gb of 8 Gb it decreasing like plane crash :) I've found this form and it is the same with my error : http://www.webhostingtalk.com/showthread.php?t=913156 There could be a hardware problem i am not sure , i see this error at least one time in a day. Do you have an advice ? unluckeyly i have found only one people who has the same error with me :) and his machine is also same with mine :D

5 6

mapping drives
by Jeff Sadino 28 Apr '10

28 Apr '10

I am having trouble mounting drives. We have a Windows 2008 (10.1.1.17, MRISRV02) server with folders I what access to. On my Fedora 8 client, in my fstab file, I have: //10.1.1.17/USERS/Jeff /home/mriuser/Desktop/jeff cifs rw,username=cluster,password=mrilab 0 0 and this works just fine. My samba is up to date: [mriuser@localhost ~]$ rpm -qa | grep "samba" samba-common-3.0.33-0.fc8 samba-3.0.33-0.fc8 system-config-samba-1.2.58-1.fc8 samba-client-3.0.33-0.fc8 However, we also have a CentOS 4 64bit "pseudo-server" machine. When I try to map the folders on this CentOS machine using an fstab entry like this: //10.1.1.17/USERS/Jeff /mnt/Jeff cifs rw,username=cluster,password=mrilab 0 0 It maps the USERS folder to /mnt/Jeff. I can cd into Users and then cd into Jeff, but I want to be able to go straight into Jeff and not have access to the rest of the user folders. I just upgraded my samba from 3.0.25 to 3.0.33 and have not restarted. [root@cluster mnt]# rpm -qa | grep "samba" samba-client-3.0.33-0.18.el4_8.1 samba-common-3.0.33-0.18.el4_8.1 samba-common-3.0.33-0.18.el4_8.1 Can anyone please help me out? Thank you!! Jeff

5 8

System Resources Graphing
by Matt 28 Apr '10

28 Apr '10

Is there a package I can get that will graph system resources such as CPU and disk I/O to an html file or something? Matt

10 16

iSCSI / GFS shared web server file system
by jchase 27 Apr '10

27 Apr '10

We currently have a MD3000i with an iSCSI LUN shared out to our apache web server. We are going to add another apache web server into the mix using LVS to load balance, however, I am curious how well iSCSI handles file locking and data integrity. I have the iSCSI partition formatted as ext3. Is my setup totally flawed and will ext3 not allow for data integrity with multiple apache hosts reading/writing to the shared storage? Am I required to also setup GFS across my apache hosts or does iSCSI somehow manage this? Thanks for helping clear this up, James

7 9

Transparent proxy with LVS
by Enrique Verdes 27 Apr '10

27 Apr '10

I've managed to configure a LVS Cluster to act as a transparent proxy squid farm, with a virtual server as load balancer, and three real servers. Because redirecting packets going to port 80 to port 3128 of squid in the load balancer doesn't works, the solution has a mix of ip route and iptables. Here is the script I wrote to configure transparent proxy. #!/bin/bash #Transparent proxy configuration #Variables VIP=192.168.18.10 WEB=80 SRV01=192.168.18.40 SRV02=192.168.18.41 SRV03=192.168.18.42 #Packet marking iptables -t mangle -F iptables -t mangle -A PREROUTING -p tcp --dport $WEB --dst ! $VIP -j MARK --set-mark 2 #Routing table creation if [ $(grep -sq 'www\.out' /etc/iproute2/rt_tables) ]; then echo "Table exists" else echo "202 www.out" >> /etc/iproute2/rt_tables fi #Clean tables and rules ip rule del prio 100 fwmark 2 table www.out ip route flush table www.out #Routing of marked packets ip rule add prio 100 fwmark 2 table www.out ip route add table www.out to local 0/0 dev lo ip route flush cache #ipvsadm rules ipvsadm -A --fwmark-service 2 ipvsadm -a --fwmark-service 2 --real-server $SRV01 --gatewaying ipvsadm -a --fwmark-service 2 --real-server $SRV02 --gatewaying ipvsadm -a --fwmark-service 2 --real-server $SRV03 --gatewaying As you can see, I mark all packets not directed to the virtual server itself, to port 80 with 2, and then route all those marked packets to the loopback interface. With ipvsadm I forward the marked packets to the real servers. In the real servers there's a rule in the prerouting chain to redirect those packets to port 3128 I'm using pulse service to start lvs, and would like to add the ipvsadm rules to the /etc/sysconfig/ha/lvs.cf, so they are issued by pulse at startup. I can't figure out how to do it. When I try to start pulse, it fails because i left the address field empty. But this service is not tied to any address, I just want the fwmark match to forward the packets to the real servers. I also have dns in this lvs cluster. Any suggestion about how I can add my ipvsad rules to the lvs.cf file? -- Enrique Verdes <EVerdes(a)conatel.com.uy> Depto. de Ingeniería - CONATEL S.A. Este mensaje es privado y confidencial y tiene como único destinatario la persona a la que va dirigida. La responsabilidad de su contenido es del remitente y no de CONATEL. Si usted ha recibido este mensaje por error, tenga presente que le está prohibido revelarlo, copiarlo o distribuirlo, debiendo avisar de inmediato al remitente y borrarlo de su sistema. El error de transmisión no implica renuncia a la privacidad y confidencialidad. This email is private and confidential and intended solely for the use of the individual to whom it is addressed. The responsibility of its content is the sender's and not CONATEL'S. If you have received this email by mistake please notify the sender immediately and delete it from your system. Its disclosure, copy or distribution is absolutely forbidden. The transmission error does not imply a waiver of privacy and confidentiality.

1 0

[off-topic] RHEL6 and NIS/YP
by Marcelo M. Garcia 27 Apr '10

27 Apr '10

Hi Did anyone managed to configure RHEL 6 beta to authenticate using NIS? During the installation the option to use NIS as authentication method is disable. When I tried to install with yum, I got the following message: Installed size: 222 k Is this ok [y/N]: y Downloading Packages: ftp://ftp.redhat.com/pub/redhat/rhel/beta/6/i386/os/Packages/yp-tools-2.9-8…: [Errno 14] PYCURL ERROR 6 - "" Trying other mirror. ftp://ftp.redhat.com/pub/redhat/rhel/beta/6/i386/os/Packages/ypbind-1.20.4-…: [Errno 14] PYCURL ERROR 6 - "" Trying other mirror. Error Downloading Packages: 3:ypbind-1.20.4-21.el6.i686: failure: Packages/ypbind-1.20.4-21.el6.i686.rpm from rhel-beta: [Errno 256] No more mirrors to try. yp-tools-2.9-8.1.el6.i686: failure: Packages/yp-tools-2.9-8.1.el6.i686.rpm from rhel-beta: [Errno 256] No more mirrors to try. Thanks Marcelo

2 1

NFS mount problem
by sync 27 Apr '10

27 Apr '10

Hi,guys: I am trying to connect to a NFS-filesystem on a CentOS 5.3 i386 guest system. The host system is CentOS 5.4 x86_64. I set up the NFS server correctly and rpcinfo is also ok inside the guest system show. The problem is, I can't connect to, or see the open port from the outside. I use the Host-Only network setup with VirtualBox 3.1.0, the ip address in the guest system is 192.168.56.101 . and the host system ip address is 192.168.7.67 When I mount the directory from the guest system via NFS, the result is the following : "mount : 192.168.56.101:/xx failed , reason given by server:Permission denied" I hope one of you can give me a hint in which direction I should continue my efforts. Thanks in advance,,,

9 17

Re: [CentOS] System Resources Graphing
by James Hogarth 27 Apr '10

27 Apr '10

Had zabbix at my last place... hated it... Use nagios + pnp4nagios now with sar running for detailed bits with a custom nagios plugin using sar for performance data. Works very nicely :) James On Apr 27, 2010 5:14 AM, "Rajagopal Swaminathan" <raju.rajsand(a)gmail.com> wrote: Greetings, On Mon, Apr 26, 2010 at 9:39 PM, Matt <lm7812(a)gmail.com> wrote: > Is there a package I can get that... Try Zabbix. It may be seem to be an overkill. All the same, it is very extensible and have tried it in couple of scenarios of remote and local monitoring of diverse devices and processes. and oh SVN checkout may be a good bet. There are, of course, rpms are CentOS are available in a repo (AndrewFarley) Available HTH, Regards, Rajagopal _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.c...

1 0

Help with NFSV4 server
by Clint Dilks 27 Apr '10

27 Apr '10

Hi Everyone, I have been trying to setup an NFS v4 File Server but have come across an odd issue. Mounting the /nfs4exports/share appears to be successful and the information displayed about partition size and free space seem correct but if I try to do anything inside the mounted directory the client will just hang. Does anyone have any idea what I am missing?? I have try disabling all firewalls and selinux but it doesn't seem to make any difference I have taken a look at http://www.brennan.id.au/19-Network_File_System.html#nfs <http://www.brennan.id.au/19-Network_File_System.html#nfs4>4 <http://www.brennan.id.au/19-Network_File_System.html#nfs4> and http://blog.laimbock.com/2009/05/21/nfsv4-on-centos-53-and-fedora-11/ and still can't see what i'm doing wrong {The Server} CentOS 5.4 64 Bit [root@inf1 /]# cat /etc/exports /nfs4exports *.scms.waikato.ac.nz(rw,insecure,sync,wdelay,no_subtree_check,no_root_squash,fsid=0,nohide) /nfs4exports/share *.scms.waikato.ac.nz(rw,insecure,sync,wdelay,no_subtree_check,no_root_squash,nohide) [root@inf1 /]# cat /etc/sysconfig/nfs # # Define which protocol versions mountd # will advertise. The values are "no" or "yes" # with yes being the default #MOUNTD_NFS_V1="no" MOUNTD_NFS_V2="no" MOUNTD_NFS_V3="no" # # # Path to remote quota server. See rquotad(8) #RQUOTAD="/usr/sbin/rpc.rquotad" # Port rquotad should listen on. #RQUOTAD_PORT=875 # Optinal options passed to rquotad #RPCRQUOTADOPTS="" # # Optional arguments passed to in-kernel lockd #LOCKDARG= # TCP port rpc.lockd should listen on. #LOCKD_TCPPORT=32803 # UDP port rpc.lockd should listen on. #LOCKD_UDPPORT=32769 # # # Optional arguments passed to rpc.nfsd. See rpc.nfsd(8) # Turn off v2 and v3 protocol support #RPCNFSDARGS="-N 2 -N 3" # Turn off v4 protocol support #RPCNFSDARGS="-N 4" # Number of nfs server processes to be started. # The default is 8. #RPCNFSDCOUNT=8 # Stop the nfsd module from being pre-loaded #NFSD_MODULE="noload" # # # Optional arguments passed to rpc.mountd. See rpc.mountd(8) #RPCMOUNTDOPTS="" # Port rpc.mountd should listen on. #MOUNTD_PORT=892 # # # Optional arguments passed to rpc.statd. See rpc.statd(8) #STATDARG="" # Port rpc.statd should listen on. #STATD_PORT=662 # Outgoing port statd should used. The default is port # is random #STATD_OUTGOING_PORT=2020 # Specify callout program #STATD_HA_CALLOUT="/usr/local/bin/foo" # # # Optional arguments passed to rpc.idmapd. See rpc.idmapd(8) #RPCIDMAPDARGS="" # # Set to turn on Secure NFS mounts. #SECURE_NFS="yes" # Optional arguments passed to rpc.gssd. See rpc.gssd(8) #RPCGSSDARGS="-vvv" # Optional arguments passed to rpc.svcgssd. See rpc.svcgssd(8) #RPCSVCGSSDARGS="-vvv" # Don't load security modules in to the kernel #SECURE_NFS_MODS="noload" # # Don't load sunrpc module. #RPCMTAB="noload" # [root@inf1 /]# cat /etc/idmapd.conf [General] Verbosity = 9 Pipefs-Directory = /var/lib/nfs/rpc_pipefs Domain = scms.waikato.ac.nz [Mapping] Nobody-User = nfsnobody Nobody-Group = nfsnobody [Translation] Method = nsswitch [root@inf1 /]# mount -l | grep bind /export on /nfs4exports/share type none (rw,bind) And an ls of /nfs4exports/share on NFS Server works from /etc/fstab /export /nfs4exports/share none bind 0 0 {The Client} [root@silver ~]# cat /etc/idmapd.conf [General] Verbosity = 0 Pipefs-Directory = /var/lib/nfs/rpc_pipefs Domain = scms.waikato.ac.nz [Mapping] Nobody-User = nfsnobody Nobody-Group = nfsnobody [Translation] Method = nsswitch From /etc/fstab inf1:/ /test nfs4 auto,rw,nodev,sync,_netdev,proto=tcp,retry=10,rsize=32768,wsize=32768,hard,intr 0 0

4 4

FW: System Resources Graphing
by Simon Billis 26 Apr '10

26 Apr '10

Matt sent a missive on 2010-04-26: > Is there a package I can get that will graph system resources such as > CPU and disk I/O to an html file or something? You could use any of these hyperic, cricket depending on your needs and wants... I use/used cacti, ganglia, mrtg and hyperic... ganglia we currently use to gather performance data and replaced hyperic (better fit for us) and we also use cacti for collecting snmp data from switches and routers. I'm considering switching to cricket in place of cacti for performance reasons (only generates graphs when needed).

1 0

URGENT
by cahit Eyigünlü 26 Apr '10

26 Apr '10

I had a geub loader error 2 on starting centos and i am able to connect rescue system this is the result how could i get system work root@rescuecd64 ~ # grub Probing devices to guess BIOS drives. This may take a long time. Unknown partition table signature GNU GRUB version 0.97 (640K lower / 3072K upper memory) [ Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists the possible completions of a device/filename. ] grub> find /boot/grub/stage1 find /boot/grub/stage1 Error 15: File not found grub>

5 5

USB keys
by m.roth＠5-cent.us 26 Apr '10

26 Apr '10

Well, we wanted to put an install on a USB key. Neither I nor the other admin was amused by the singing and dancing that the wiki offers - and just *why* is it that syslinux is broken? At any rate, I did some googling, and found <http://www.pendrivelinux.com/>, and I ran this installer. Ok, it has some bugs: a) I had several .isos, and it *insisted* on grabbing the first one, alphabetically, no matter that I put in the full name. It also takes for-bloody-ever - 4.5 *hours* for the 4G DVD. However, it finished, I stuck it into a laptop, told it to boot from the USB, and there was the begin install screen. *shrug* Looks good to me. I just do not understand why it's such a song and dance, rather than, say, syslinux /dev/sdb1 mount /dev/sdb1 /tmp/mnt mount -o loop CentOS....iso /mnt cp -pr /mnt/ /tmp/mnt mark

4 6

Sendmail problem
by sync 26 Apr '10

26 Apr '10

Hi, guys:

1 1

Raymonde Haghebaert
by wahyu.darmawan 26 Apr '10

26 Apr '10

http://rahulcoach.com/default/index.php

1 0

creating a local repo
by john maclean 25 Apr '10

25 Apr '10

rsync'ing ain't working for me. Is this the right syntax? rsync -avrt rsync://mirror.ovh.net/centos/5.4/updates/i386 --exclude=debug/ updates/ rsync: getaddrinfo: mirror.ovh.net 873: Temporary failure in name resolution rsync error: error in socket IO (code 10) at clientserver.c(107) [receiver=2.6.8] -- John Maclean 07739 171 531 MSc (DIC) Enterprise Linux Systems Engineer

3 3

IPV6 and DNS...
by John Doe 25 Apr '10

25 Apr '10

Hi, I keep getting entries like these in my logs: network unreachable resolving '0.centos.pool.ntp.org/AAAA/IN': 2001:500:40::1#53: 1 Time(s) network unreachable resolving '0.centos.pool.ntp.org/AAAA/IN': 2001:500:e::1#53: 1 Time(s) network unreachable resolving '0.centos.pool.ntp.org/AAAA/IN': 2001:dc3::35#53: 1 Time(s) I don't see any IPV6 parameters to disable in named.conf, apart from the 'listen-on-v6' which I commented, and the 'query-source-v6' which is commented by default... I disabled IPV6 in the sysconfig files; but not in the modprobe.conf though... Can I just ignore these "errors"? Thx, JD

2 1

OT: Caching synchronous writes
by Ray Van Dolson 24 Apr '10

24 Apr '10

[ Wish there was a generic, active Linux "storage" mailing list out there -- something other than the kernel lists I mean ] To frame the discussion, we use VMware ESX (vSphere) quite a bit with NFS datastores. Often times with NetApp, but lately, more often with Solaris 10 + ZFS + SSD's for ZIL (intent log or write cache). The ZIL lets us use synchronous writes (safer) without the normal delay. Were we to try and get the same level of performance with Linux, we'd need to use async mode for our NFS shares -- and we'd lose some reliability. However, given the latest rumblings and ruminations about Oracle potentially no longer selling entitlements for Solaris 10 on non-Sun hardware -- and then turning around and no longer allowing you to run Solaris 10 "freely", we're left with either OpenSolaris or looking at Linux again (we run Solaris 10 on Silicon Mechanics hardware). My question is, what are the various options for getting NFS in "sync" mode to run fast on Linux? Obviously we can buy a really nice disk controller with lots of cache, but I'm thinking more at the filesystem, volume manager or block driver layer. Is there a way to shunt write requests to a quicker medium like an SLC-based SSD (or NVRAM)? I don't see a way to do this with LVM, ext3/ext4 or even xfs... maybe btrfs will have some options along this line down the road, but that's tomorrow and not today. So is a beefy disk controller our best option? Even using our 3Ware 9650's w/ BBU so we can enable write-back doesn't seem to give us as good of write performance via NFS as ZFS+ZIL-on-SSD does... Ray

7 19

Problem shuting down server.
by Enrique Verdes 24 Apr '10

24 Apr '10

Have Centos 5.3 installed in a HP ML110 server. After cloning disk using Clonezilla, if I issue a shutdown -h now, or any other command to shut down the server (i.e. init 0 or poweroff), instead of shutting down the server reboots. I googled but could't find any answer. ¿Does anybody has a clue about why this is happening? -- Enrique Verdes <EVerdes(a)conatel.com.uy> Depto. de Ingeniería - CONATEL S.A. Este mensaje es privado y confidencial y tiene como único destinatario la persona a la que va dirigida. La responsabilidad de su contenido es del remitente y no de CONATEL. Si usted ha recibido este mensaje por error, tenga presente que le está prohibido revelarlo, copiarlo o distribuirlo, debiendo avisar de inmediato al remitente y borrarlo de su sistema. El error de transmisión no implica renuncia a la privacidad y confidencialidad. This email is private and confidential and intended solely for the use of the individual to whom it is addressed. The responsibility of its content is the sender's and not CONATEL'S. If you have received this email by mistake please notify the sender immediately and delete it from your system. Its disclosure, copy or distribution is absolutely forbidden. The transmission error does not imply a waiver of privacy and confidentiality.

2 1

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