Discuss January 2011

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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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Intel DH67BL + CentOS 5.5 IRQ #177 nobody cared
by Drew Weaver 19 Apr '11

19 Apr '11

Hello, We have built a couple of CentOS 5.5 systems on the Intel DH67BL (Sandy Bridge) motherboard and overall they work pretty well. I'm having one problem which keeps cropping up and that is an error message that says: IRQ 177 nobody cared (try booting with the irqpoll option) report bad irq, references CPU idle then it references usb_hcd_irq and e1000_intr then it disables the add-on PCI E1000 card and disconnects itself from the network. I'm assuming what is happening here is the USB controller and the add-on E1000 controller we put in are having an old school IRQ conflict, the question is why and how can I avoid it? I have tried disabling all of the extra stuff in the BIOS that I could, and this still happens fairly frequently. Any advice would be great. thanks, -Drew

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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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backup script
by madunix＠gmail.com 21 Mar '11

21 Mar '11

I want to create bash script to have a zip copy from a website running on linux /var/www/htdocs/* local on the same box on different directory I am thinking to do a local backup using crontab (snapshot my web) tar -cvzf /tmp/website-$(date +%Y%m%d-%H%M).tgz /var/www/htdocs/* This command will create a file /tmp/website-20110101-1459.tgz I want it run on daily basis and to keep the last 5days backup on the box and remove older version than 5days. Can you point me out. Thanks madunix

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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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Could CentOS 5.5 on newer hardware make it freeze or shutdown?
by cwlists 27 Feb '11

27 Feb '11

Hi, I have built a new PC on which I've installed CentOS 5.5 64-bit (with updates) which after some hours of running suddenly either hard freeze or instant power off. The /var/log/messages log doesn't reveal anything of what has happened. The load has been either just idling or with moderate disc activities (transfers over 100GBit). Below is the hardware spec: Motherboard: Gigabyte GA-H55N-USB3 CPU: Intel Core i5 650 RAM: CORSAIR 8 GB RAM HDD1: Intel X25-M 80GB HDD2-7: Samsung ECHOGREEN 500GB ST LABS SATA/300 4-PORT PCI-E PSU: Corsair CX 430W I've also been running memtest86 for more than 24 hours without any errors. I was on my way to return either the motherboard or the PSU when I thought of installing Fedora 14 and give it a try. The PC has now been running for over 48 hours without any glitch, with varying load. I should also mention another problem that strangely disappeared with F14, and that was that the Samsung HDDs, which I have in a soft RAID6, now and then timed out (only one at a time). The message log showed a dump of NCQ queued commands, before it reconnected that disk. In F14 I haven't seen any errors at all in the log. Could those problems only relate to C5, or do you think I also have hardware problems and only been lucky so far with F14? Best Regards, Christian

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redirecting traffic using iptables
by Jobst Schmalenbach 24 Feb '11

24 Feb '11

Hi. I have two internet connections, the ADSL2+ is very very cheap (but fast 10mb) and I want to use the SHDSL (2mb) only for mail,ssh,http OUT and the ADSL2+ only for surfing. I all works fine if people specify the proxy in the browser, but in case like flash it of no use. Further if I can make the 80/443 traffic go through the proxy only, its an added bonus. If this can be done, fine. Bue I want all 80/443 traffic go through host2. SHDSL ADSL2+ ------ ------- host 1 host2 SQUID ------ ------- | | ------------ host3 ------------ | eth1 On host 3 I have been trying to do this with IPtables, but I am stuck, I tried to utilise squid too, does not work tried: iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j DNAT --to $PROXY:3128 iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 443 -j DNAT --to $PROXY:3128 browser tell me "invalid request". All I want is to redirect all traffic through host2 if ports 443 and 80 are encountered, thats all. If it goes through the proxy it is an added bonus, but not required. ANy ideas, anyone? Jobst -- 'Two things are infinite: the universe and human stupidity, and I'm not sure about the first one. - Albert Einstein | |0| | Jobst Schmalenbach, jobst(a)barrett.com.au, General Manager | | |0| Barrett Consulting Group P/L & The Meditation Room P/L |0|0|0| +61 3 9532 7677, POBox 277, Caulfield South, 3162, Australia

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Discuss January 2011