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Too much cpu wait on nfs server when we need to read data on it
by fabien faye 25 Jan '10

25 Jan '10

Hi, I have a big server with 24 Disk on 2 3ware card. When i write data on my nfs server everything is fine but when i want to read data i have a lot of cpu wait. [root@NFS /]# vmstat 1 procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------ r b swpd free buff cache si so bi bo in cs us sy id wa st 0 1 112 9592 7140 1879496 0 0 621 1180 6 2 0 2 86 11 0 0 9 112 10668 7148 1877760 0 0 84 21600 1926 454 0 3 49 49 0 1 3 112 9308 7156 1879092 0 0 1400 1580 2123 2009 0 2 50 48 0 0 0 112 9432 7156 1879476 0 0 3664 0 2275 2862 0 3 81 17 0 0 1 112 9212 7172 1879588 0 0 2196 32 2132 2293 0 2 66 32 0 1 0 112 9848 7180 1878864 0 0 1268 4168 1852 1934 0 2 84 14 0 0 7 112 11208 7180 1876936 0 0 92 13124 1339 355 0 2 50 48 0 0 0 112 10708 7188 1877512 0 0 628 16 1552 1014 0 1 84 16 0 0 1 112 10344 7188 1878044 0 0 472 0 1334 721 0 1 89 10 0 0 1 112 10372 7196 1878136 0 0 1936 32 2268 2850 0 2 50 48 0 0 0 112 10336 7192 1878312 0 0 2220 0 2308 2966 0 2 51 47 0 0 0 112 9716 7200 1879012 0 0 696 28 1484 885 0 1 89 11 0 0 2 112 9400 7200 1879280 0 0 236 0 2112 5819 0 8 75 18 0 0 0 112 9980 7196 1878816 0 0 1360 20 1840 1743 0 1 83 15 0 0 15 112 9168 7196 1879580 0 0 768 0 1423 728 0 1 91 9 0 0 0 112 10756 7200 1877752 0 0 4068 32 2788 4225 0 4 70 26 0 I have tuned nfs server with this option : RPCNFSDARGS="-N 2" RPCNFSDARGS="-N 4" MOUNTD_NFS_V3="yes" RPCNFSDCOUNT=160 about the file system, i use ext4 on LVM partition. Do you have any idea about that. Fabien FAYE RHCE www.generationip.com Free network tools & HOWTO for centos and Redhat

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Re: [CentOS] authentication failure
by fabien faye 25 Jan '10

25 Jan '10

Hi, I am a fail2ban user and i am very interested to have an autosent mail to the ip provider of the brute force ip address. Do you know if it is possible with fail2ban or if we have to rewrite action in fail2ban ?. Fabien FAYE RHCE www.generationip.com Free network tools & HOWTO for centos and Redhat ----- Mail Original ----- De: "Athmane Madjoudj" <athmanem(a)gmail.com> À: "CentOS mailing list" <centos(a)centos.org> Envoyé: Samedi 23 Janvier 2010 18:20:01 Objet: Re: [CentOS] authentication failure On Sat, Jan 23, 2010 at 6:14 PM, madunix <madunix(a)gmail.com> wrote: > I noticed that my server has a lot ca. 1000x auth failure from > different alocated in China / Romania and Netherlands per day since 3 > days > It looks to me like somebody was trying to get into server by guessing > my password by brute force. > what would be the best to stop this attack and how? the server running > apache mysql and ftp > PORT STATE SERVICE > 21/tcp open ftp > 80/tcp open http > 443/tcp open https > 3306/tcp open mysql > ... > Jan 22 16:07:14 user vsftpd(pam_unix)[17462]: authentication failure; > logname= uid=0 euid=0 tty= ruser= rhost=195.95.228.150 > Jan 22 16:07:16 user vsftpd(pam_unix)[16737]: check pass; user unknown > Jan 22 16:07:16 user vsftpd(pam_unix)[16737]: authentication failure; > logname= uid=0 euid=0 tty= ruser= rhost=195.95.228.150 > Jan 22 16:07:17 user vsftpd(pam_unix)[17462]: check pass; user unknown > Jan 23 17:23:52 user vsftpd(pam_unix)[20524]: authentication failure; > logname= uid=0 euid=0 tty= ruser= rhost=221.7.40.47 > Jan 23 17:23:55 user vsftpd(pam_unix)[20524]: check pass; user unknown > Jan 23 17:23:55 user vsftpd(pam_unix)[20524]: authentication failure; > logname= uid=0 euid=0 tty= ruser= rhost=221.7.40.47 > Jan 23 17:23:59 user vsftpd(pam_unix)[20524]: check pass; user unknown > Jan 23 17:24:58 user vsftpd(pam_unix)[20524]: authentication failure; > logname= uid=0 euid=0 tty= ruser= rhost=221.7.40.47 > Jan 23 00:37:47 user vsftpd(pam_unix)[1791]: check pass; user unknown > Jan 23 00:37:47 user vsftpd(pam_unix)[1791]: authentication failure; > logname= uid=0 euid=0 tty= ruser= rhost=217.23.14.168 > Jan 23 00:38:06 user vsftpd(pam_unix)[1791]: check pass; user unknown > Jan 23 00:38:06 user vsftpd(pam_unix)[1791]: authentication failure; > logname= uid=0 euid=0 tty= ruser= rhost=217.23.14.168 > ... > > Thanks > _______________________________________________ > CentOS mailing list > CentOS(a)centos.org > http://lists.centos.org/mailman/listinfo/centos > Maybe a brute force attack, try to install a HIDS like: APF/BFD: http://www.rfxn.com/projects/advanced-policy-firewall/ http://www.rfxn.com/projects/brute-force-detection/ Fail2ban: http://www.fail2ban.org/ Fail2ban is available in EPEL repos. HTH -- Athmane Madjoudj _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

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Username and Password
by Michael Makotore 25 Jan '10

25 Jan '10

Could you please help me I forgot my username and password. Regards Michael

2 1

how to change fsize to unlimited..
by Yan Yu 25 Jan '10

25 Jan '10

Dear centos experts, I am wondering is there a way for me to change ulimit fsize parameter? I am trying to change it to unlimited, so I added the following line to /etc/security/limits.conf - - fsize -1 but it does not work, and a reboot will reset the content of limits.conf. thanks, yan

2 1

iPod Touch/iPhone VPNs with CentOS.
by Bill Campbell 25 Jan '10

25 Jan '10

I am looking at options for VPN connections from iPhones and iPod Touches to CentOS systems. We use OpenVPN for connections with Windows, Mac OS X, and other Linux systems, but there don't appear to be any OpenVPN clients for iPhones (presumably because there are no tun/tap interfaces available yet). My experiences getting IPsec running on CentOS systems with OpenVPN have not been pretty. Any suggestions are welcome. Thanks. Bill -- INTERNET: bill(a)celestial.com Bill Campbell; Celestial Software LLC URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way Voice: (206) 236-1676 Mercer Island, WA 98040-0820 Fax: (206) 232-9186 Skype: jwccsllc (206) 855-5792 The stamping of paper is an operation so much easier than the laying of taxes, that a government, in the practice of paper emissions, would rarely fail, in any such emergency [such as an election], to indulge itself too far in the employment of that resource... -- Alexander Hamilton

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streamripper & CentOS?
by Brian 25 Jan '10

25 Jan '10

I am trying to build streamripper from source, I don't see rpms available for it. I have all the parts of yum groupinstall 'Development Tools' in place. rpm shows that a 2.5.* is in use # rpm -q glibc glibc-2.5-42.el5_4.3 Any attempt do get past the ./configure for streamripper fails checking for GLIB - version >= 2.16.0... no *** Could not run GLIB test program, checking why... *** The test program failed to compile or link. See the file config.log for the *** exact error that occured. This usually means GLIB is incorrectly installed. configure: error: Glib 2.16 or greater required After a lot of googling, I see some people on Ubuntu seem to have been missing a glibc-dev: http://sourceforge.net/projects/streamripper/forums/forum/19083/topic/34574… but I don't see that available for me to pull from yum, and trying variants via: [root@localhost streamripper-1.64.6]# yum provides */libglib* does not pull up what I seem to need here either. I feel I must be missing some path, but I cannot find it. I built this fine on my BSD machines, and this app is part of the available install base for e.g. Ununtu and FreeBSD etc-- it is not as if this is esoteric. Does this not build under CentOS? or am I missing something really straightforward. I searched the forums via google and find really no one talking about this, so either I'm missing some path or something obvious, despite looking, or it's just kown/assumed to not work. I am running : Linux localhost.localdomain 2.6.18-164.11.1.el5 #1 SMP Wed Jan 20 07:32:21 EST 2010 x86_64 x86_64 x86_64 GNU/Linux freshly installed and updated 5.x. Thanks for thoughts- Brian

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Gmail problem
by Majian 25 Jan '10

25 Jan '10

Hi,all : There is gmail drive for windows platform<http://www.linuxforums.org/forum/#>where the person can access his gmail storage space as a drive. Do we have something similar on Linux? Means is there any software that will allow the person to 'mount' the gmail storage and say 'copy/paste' from his system to the gmail account? Thanks ~

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totem: something wrong with gstreamer-plugins-ugly
by ken 25 Jan '10

25 Jan '10

When running totem to play a move (e.g. mpeg-1 file), it fails with the message: "A MPEG-1 System Stream demuxer plugin is required to play this stream, but not installed." After reading docs and trying various things I've reduced the source of the problem to the package gstreamer-plugins-ugly-0.10.11-1.el5.rf.i386.rpm # rpm --rebuilddb # rpm -q libdvdread libdvdread-4.1.3-1.el5 # rpm -i gstreamer-plugins-ugly-0.10.11-1.el5.rf.i386.rpm error: Failed dependencies: libdvdread.so.3 is needed by gstreamer-plugins-ugly-0.10.11-1.el5.rf.i386 And, after erasing libdvdread and trying to install both packages in one command, I get pretty much the same contradictory error message: # rpm -iv libdvdread-4.1.3-1.el5.i386.rpm gstreamer-plugins-ugly-0.10.11-1.el5.rf.i386.rpm error: Failed dependencies: libdvdread.so.3 is needed by gstreamer-plugins-ugly-0.10.11-1.el5.rf.i386 There's no problem installing libdvdread by itself: # rpm -iv libdvdread-4.1.3-1.el5.i386.rpm Preparing packages for installation... libdvdread-4.1.3-1.el5 # rpm -q libdvdread libdvdread-4.1.3-1.el5 So how are people getting totem to play movies? tia. -- Without music, life would be a mistake. --Friedrich Nietzsche

5 13

Centos 5.2 mysql build
by Rajagopal Swaminathan 24 Jan '10

24 Jan '10

Greetings, I wanted to enable blackhole and CSV engine in the mysql server so downloaded the SRPM from Centos Site, setup the rpmbuild envronment with mighty help from the our own Russ's Owlriver website and tried building it. I have a 5.2 centos box on which I need to enable this so took the 5.2 SRPM (mysql-5.0.45-7.el5.src.rpm) from vault.centos.org.(mysql The Build did not complete throwing errors during testing about unable to connect using ssl or something. I tried from 5.4 SRPM at least the build went thru. Was 5.0.45 srpm broken? or did I get it horribly wrong somewhere as it is my first attempt to build from srpm. Now I have a situation wherein the PHDs refuse to work with the Mysql 5.0.77 (y'know those typical silly scared rabbits who will never move from status quo no matter what) I fished around and found that there was a BIG thread on this issue. I understand it is a upstream issue. But in the EOD, I need a tested stuff not homegrown one (according to the PHDs and I am new in this job, never mind I will be completing 26 years in IT field on 3rd Feb...). Has anybody come across this error? if so how it was mitigated? The issue here is we need to show it working on centos and then when going live the production will be switched over to RHEL (Sorry Centos guys... That's the way this Indian (1/6th) part of the world goes about: kinda "successful POC first and then I give hard cash"). Thanks and Regards, Rajagopal

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32 bit Full Virtualized DomU on 64 Dom0
by Sergio Belkin 24 Jan '10

24 Jan '10

Hi, I need to virtualize a physical machine (Debian Etch 32 bit) to run on Centos 5.4 64 bit. Can I do that? I mean can a full virtualized DomU 32 bit run on a 64 bit Dom0. Thanks in advance!! -- -- Open Kairos http://www.sergiobelkin.com Watch More TV http://sebelk.blogspot.com Sergio Belkin -

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