Discuss September 2010

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Centos v3.3 CD 2
by Luis-Miguel Astudillo 15 Nov '11

15 Nov '11

Sorry, I have been away for a while. has anyone fixed CD2 fotr CentOS v3.3 ? -- Luis

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Redirecting PHP error messages into a log file
by Alexander Farber 29 Jun '11

29 Jun '11

Hello, I'm using CentOS release 5.5 x86_64 with the stock php-5.1.6-27.el5 and would like to redirect PHP messages into /var/log/httpd/php_log First I tried adding that file name to /etc/php.ini: error_log = "/var/log/httpd/php_log" and restarted httpd, but the file didn't appear. I've touched it and changed owner to apache.apache, but that didn't help. Then I've changed that line to error_log = syslog and now I get the messages in /var/log/messages: Jul 29 21:29:24 hXXX httpd: PHP Notice: Undefined index: REMOTE_ADDR in /var/www/html/odnoklassniki/index.php on line 44 Jul 29 21:29:45 hXXX httpd: PHP Parse error: syntax error, unexpected '[' in /var/www/html/odnoklassniki/index.php on line 44 I still would like to move those message to a separate file though, so I've added the following line to /etc/syslog.conf and reloaded syslogd service: httpd.* /var/log/httpd/php_log but the file is still empty. Any hints please? Thank you Alex -- http://preferans.de

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Lingering dhclient issue
by Alfred von Campe 22 Jun '11

22 Jun '11

I recently reconfigured some CentOS 4.3 systems that were using DHCP to use static IP addresses. At the same time, the systems were moved to a new VLAN. Here is the approximate sequence of events that took place: 1. ifdown eth0 2. edit /etc/sysconfig/network-scripts/ifcfg-eth0 with static IP address 3. wait for network folks to reconfigure switch 4. ifup eth0 I may have reversed steps 1 and 2 on some of the systems. The problem was that the dhclient process didn't go away, and kept renewing the old lease. Our DHCP server is configured to contact the DNS server and update the entry for each host it serves. So the DNS entries for these systems were pointing to the old address in the old VLAN. The eth0 interface itself just kept the static IP address for which it was configured. It took me a while to figure out what was going on. My question is, what could I have done to avoid this (other than killing the dhclient process)? Is there a better way to reconfigure an interface to use a static address? I am not interested in solutions that involve using a GUI (i.e., only command line solutions). Thanks, Alfred

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Re: [CentOS] Issue with Perl and rpmforge - advice? - SOLVED
by Mark 13 Jun '11

13 Jun '11

On Wed, Sep 1, 2010 at 6:51 PM, Mark <mhullrich(a)gmail.com> wrote: > I have an old version of rkhunter installed on my CentOS 5 machine, > one I got from rpmforge. > > In my most recent attempts to update this, I get the following errors in yum: > : > --> Finished Dependency Resolution > perl-AnyEvent-5.240-1.el5.rf.noarch from rpmforge has depsolving problems > --> Missing Dependency: perl(Net::SSLeay) >= 1.33 is needed by > package perl-AnyEvent-5.240-1.el5.rf.noarch (rpmforge) > Error: Missing Dependency: perl(Net::SSLeay) >= 1.33 is needed by > package perl-AnyEvent-5.240-1.el5.rf.noarch (rpmforge) The solution (from the rpmforge users list) was to exclude perl-AnyEvent. Just thought you should know.... Mark

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To PAE or not to PAE...
by John Doe 16 Apr '11

16 Apr '11

Hi, I was wondering if anyone would know the cons of running a PAE kernel...? I have a 4GB pc and was wondering if it was worth going the PAE way to gain those exta 700MB... In the past, I heard that these 700MB were normally reserved for bios or chipset stuff... And that running in PAE would slow down some processes. By the way, I know 64 bits would solve this dilemn but right now I am 32bits... Thx, JD

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CentOS MD RAID 1 on Openfiler iSCSI
by Emmanuel Noobadmin 01 Mar '11

01 Mar '11

Has anybody tried or knows if it is possible to create a MD RAID1 device using networked iSCSI devices like those created using OpenFiler? The idea I'm thinking of here is to use two OpenFiler servers with physical drives in RAID 1, to create iSCSI virtual devices and run CentOS guest VMs off the MD RAID 1 device. Since theoretically, this setup would survive both a single physical drive failure as well as a machine failure on the storage side with a much shorter failover time than say using heartbeat. Or is this yet another stupid idea again from me? :D

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what pkg contains libstdc++-libc6.2-2.so.3
by Fong Vang 02 Feb '11

02 Feb '11

In CentOS 4.1/2, what package contains this library: libstdc++-libc6.2-2.so.3? I installed a couple of the compat- packages, but this library is still missing.

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gdm_slave_xioerror_handler problem
by sync 07 Jan '11

07 Jan '11

Hi , guys: Today , I work on my laptop which uses the CentOS x86_64 operating system , Suddenly the X-windows restarts when left at the login screen for more than a few seconds. The error in my syslog is: Apr 12 15:26:45 localhost gdm[2892]: gdm_slave_xioerror_handler: Fatal X error - Restarting :0 This message came up serval times previously ~ Any other help would be nice. Thanks in advance ~

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Problem with SSHD update.
by James B. Byrne 07 Jan '11

07 Jan '11

This morning I applied the 13 or so new updates to my servers. On one of them the ssh service and clients stopped working immediately after the update. I restarted the server in anticipation that there might be some instability introduced by updating on a system with active ssh connections. However, this has not cleared the problem. The packages in question are: openssh.i386 0:4.3p2-41.el5_5.1 openssh-askpass.i386 0:4.3p2-41.el5_5.1 openssh-clients.i386 0:4.3p2-41.el5_5.1 openssh-server.i386 0:4.3p2-41.el5_5.1 The error I am getting when attempting to start the sshd service is this: Starting sshd: Auto configuration failed 6486:error:0E065068:configuration file routines:STR_COPY:variable has no value:conf_def.c:629:line 207 [FAILED] Can anyone reading this inform me as to what this means, what the likely cause is, and how it may be repaired? I have webmin access to the server and, as it is inside our firewall I can probably enable telnet to get a terminal window do carry out modifications. But I need to know what it is that I need to modify. Alternatively, can anyone point me to a reference regarding removing the current version of openssh and reverting to the prior version, which worked with presumably the same user configuration that the present version does not accept. The only references that I can find respecting this error message are all several years old and some of them suggest that their is a problem with accessing or using /dev/random or /dev/urandom. This matter is somewhat urgent. I have temporarily routed essential ssh connections through a spare host but the box affected sits in front of our legacy systems providing secure access to them as their native OSs and telecom protocols do not support encryption. It is very important that the SSHD service be restored on this host as soon as is possible. Any help with this is gratefully appreciated. -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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Routing of outgoing packets
by Mitja Mihelič 22 Nov '10

22 Nov '10

Hi! I am trying to use hping to chek the latency of our network. Somehow things are not going to plan and I thought someone might be able to shed some light on the subject. Here is the setup: (the IP addresses gvien here are fake, but they do represent the correct state of the networking setup) vlan interface IP mask V2 eth0 192.168.20.20 32 V4 eth1 172.16.4.40 32 V6 eth2 172.16.6.60 32 The default route is set to eth1. The idea is to use eth2 for pinging only, the other two interfaces are used by another service and management access. If I do: ping -c 2 -I eth2 74.125.39.147 or fping -c 2 -I eth2 74.125.39.147 It binds to eth2 and sends its ICMP probes via that interface with the IP on that interface. If I do: hping3 -1 -c 2 -I eth2 74.125.39.147 -VD or [root@server ~]# hping3 -c 2 -I eth2 74.125.39.147 -VD DEBUG: if lo: Don't Match (but seems to be UP) DEBUG: if eth0: Don't Match (but seems to be UP) DEBUG: if eth1: Don't Match (but seems to be UP) DEBUG: if eth2: OK using eth2, addr: 172.16.6.60, MTU: 1500 It supposedly binds to eth2. But tcpdump tells another story. Packets get sent out via the default route (eth1) with the IP from eth2 set as the source address. The same happens with tcptraceroute (tcptraceroute-1.5-0.beta7.el5.rf.i386.rpm). I have tried various routing policies, but I have yet to find a solution that works. I have used iptables to log the packets in the OUTPUT chain, but they arrive there with the interface already set to eth1. Can anyone help ? Regards, Mitja Mihelic

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Discuss September 2010