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34753 discussions

differences in DNS between boxes
by Mike -- EMAIL IGNORED 05 Aug '09

05 Aug '09

Please refer to my thread "excessive DNS slows httpd" in which I discuss a very slow response from my httpd server on my CentOS box after modifying httpd.config . I have "solved" the problem by blocking all DNS in iptables on my CentOS box. As it happens, this is not a problem in my present configuration, but it can hardly be considered a good solution. Given that the httpd configurations are essentially identical, it appears that there is a difference between my Feodora box and my CentOS box regarding how and when DNS is handled, at least when originated by httpd. Suggestions would be most welcome. Mike.

6 13

php-pdo
by Peter Peltonen 05 Aug '09

05 Aug '09

I wish to use PostgreSQL with PHP+PDO. I haven't use PDO before. I have the php-pdo package installed on my CentOS 4.7 server: # rpm -qa |grep pdo php-pdo-5.1.6-3.el4s1.10 Now when I try connect to the PostgeSQL db with this code: <?php print "PDO test<br />"; try { $db = new PDO("pgsql:host=192.168.0.180;port=5432;dbname=mydb;user=test;password=test"); } catch(PDOException $e) { print "Error : " . $e->getMessage() . "<br/>"; die(); } ?> I get no output in the browser, but I see this error in Apache log: PHP Fatal error: Class 'PDO' not found in /var/www/html/pdotest.php on line 4 Well, it appears the PDO class is not provided by the php-pdo package: # rpm -ql php-pdo |less/etc/php.d/pdo.ini /etc/php.d/pdo_sqlite.ini /usr/lib/php/modules/pdo.so /usr/lib/php/modules/pdo_sqlite.so So, what package does provide it or have I misunderstood something? Regards, Peter

4 7

[Q} how can O.S. predicate a disk going to failure??
by mcclnx mcc 04 Aug '09

04 Aug '09

we have CENTOS 4.X on DELL server and one one of virtual disk include 4 disk configure as REID5 (one more disk for hot spare). I saw /var/log/messages file have: Aug 4 06:27:02 host1 Server Administrator: Storage Service EventID: 2094 Predictive Failure reported: Physical Disk 1:5 Controller 0, Connector 1 Aug 4 06:27:02 host1 Server Administrator: Storage Service EventID: 2051 Physical disk degraded: Physical Disk 1:5 Controller 0, Connector 1 I use DELL OPMN to check and found "disk 1:5" still "online", but "predicate failure". I also use DELL OPMN to check virtual disk and it show "online", not "degrade". my questions are: 1. is this disk really "degrade" or not? 2. how O.S. can predicate disk going to failure? 3. do I need replace this disk now? Thanks. ______________________________________________________________________________________________________ 付費才容量無上限？Yahoo!奇摩電子信箱2.0免費給你，信件永遠不必刪！ http://tw.mg0.mail.yahoo.com/dc/landing

9 8

question on managing multiple boxes
by Jerry Geis 04 Aug '09

04 Aug '09

How do admins handle a situation with many boxes like 50 for example. If I wish to tell 50 boxes to run a handful of commands - how is that done? (I mean without actually logging into 1,2,3,4...X and executing the commands) Thanks, Jerry

8 7

ghc and xmonad
by lostson 04 Aug '09

04 Aug '09

Hello Has anyone tried to build ghc and xmonad on a centos 5.3 set or is there a repo somewhere with the goodies ? -- LostSon http://lostsonsvault.org centOS its not just for servers...

1 0

Strange XEN on CentOS HWaddr Address Issue
by Brett Serkez 04 Aug '09

04 Aug '09

Ran into a strange issue with XEN on CentOS that I think is specific to CentOS, which is why I'm starting by posting to this list first, I'll post on the XEN list depending on responses. My sense is this issue has something to do with how CentOS handles network setup on first boot of the XEN kernel. - Installed a brand new CentOS 5.3 server with minimal packages. - Installed XEN, modified grub.conf to boot off of the XEN kernel and rebooted. - After reboot, network connectivity was lost. - Investigation concluded the issue was that the HWaddr address of the physical NIC matched the fabricated HWaddr that XEN uses for most of its adapters: FE:FF:FF:FF:FF:FF. - Temporary resolution, I re-enabled the motherboard's NIC, rebooted, all seems to be working. I would like to get the NIC in question working as it is a GigaBit NIC, but it still has the HWaddr: FE:FF:FF:FF:FF:FF which conflicts with XEN. My understanding of the HWaddr is that the first portion is manufacturer assigned for uniqueness, I cannot image this NIC originally had this HWaddr, but I don't know what it originally was. Does anyone know if this value is read from the NIC on each boot, or is it stored in a file after the first boot? Is there someway to undo this change so the NIC returns to its original value or atleast a non-conflicting value? Has anyone else seen this behavior? Thank you in advance, Brett

9 12

firewall setup for nfs
by Jerry Geis 04 Aug '09

04 Aug '09

Below is my firewall rules for iptables. everything is working fine except for NFS I cannot mount my drive. If I turn off iptables I can mount. Looking at this : http://www.centos.org/docs/5/html/Deployment_Guide-en-US/ch-nfs.html Important In order for NFS to work with a default installation of Red Hat Enterprise Linux with a firewall enabled, IPTables with the default TCP port 2049 must be configured. Without proper IPTables configuration, NFS does not function properly. The NFS initialization script and rpc.nfsd process now allow binding to any specified port during system start up. However, this can be error prone if the port is unavailable or conflicts with another daemon. I have port 2049 listed in my iptables. Is there a reason I cannot mount? thanks, Jerry ------------------------------ # Firewall configuration written by system-config-securitylevel # Manual customization of this file is not recommended. *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :RH-Firewall-1-INPUT - [0:0] -A INPUT -j RH-Firewall-1-INPUT -A FORWARD -j RH-Firewall-1-INPUT -A RH-Firewall-1-INPUT -i lo -j ACCEPT -A RH-Firewall-1-INPUT -i lo -j ACCEPT -A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT -A RH-Firewall-1-INPUT -p 50 -j ACCEPT -A RH-Firewall-1-INPUT -p 51 -j ACCEPT -A RH-Firewall-1-INPUT -p udp --dport 5353 -d 224.0.0.251 -j ACCEPT -A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 2049 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 2049 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 69 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 69 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 6540 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 6500 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 6510 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 6520 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 5060 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 5036 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 4569 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 1720 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 4520 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 123 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 53 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 5900 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 5900 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 2000 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 2000 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 5353 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 5353 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 6544 -j ACCEPT -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited

4 4

CentOS village @ HAR
by Didi 04 Aug '09

04 Aug '09

Hey I am just organizing the CentOS village at HAR and need a rough estimate of people who will be attending. What do people want? Shall the CentOS people have their own party tent? We are currently with the Fedora people. I will also post on the SL mailing list. Hope to see you all at HAR? Cheers Didi ---- My www page: www.ribalba.de Email / Jabber: ribalba(a)gmail.com Skype : ribalba

3 2

Yum - which repo did a package come from
by Linux Advocate 04 Aug '09

04 Aug '09

guys, i have installed mailscanner, spamassassin, etc on my machine. This was done sometime ago. Some of these rpms i got not frm centos repos. What command ( or yum command ) can i use to find out which repo did this installled package come from. yum info packagename just says; repo : installed i was hoping for something like repo:rpmforge or something similiar. i have these 3 rpms which i cant remember where i got them from. dovecot-1.0.7-7.el5 mailscanner-4.74.13-2 spamassassin-3.2.5-1.el5 Regards, Marco.

4 6

help - batch account creation
by David Leon 04 Aug '09

04 Aug '09

Hello guys I have a new Centos 5.3 running, and I have a text file with a bunch of accounts (more than 100) that I should create . File format is like this user1 pasword1 user2 passwrd2 .... How can I do this task easier than creating user one by one by hand? Need some help for building an script to achieve this task Thanks David

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