CentOS is a Linux distribution standing for "Community ENTerprise Operating System" and is a rebuild of "Red Hat Enterprise Linux" (RHEL). The "CentOS6" tag refers to versions 6.x of CentOS.

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How to integrate Ngin-x with APC and php

I'm running a PHP script on a Nginx server. I've installed APC but I'm not sure whether it's working with Nginx or not My server is CentOS with cPanel. I have full control and root access. What ...
1
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1answer
7k views

centos6 apache2 Invalid Command SSLEngine

Running: CentOS6 x64 When I restart httpd, I get the following error. What am I missing? [root@localhost ~]# service httpd restart Stopping httpd: [ OK ...
2
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1answer
3k views

error: internal error process exited while connecting to monitor: Supported machines are:

I'm moving Ubuntu Server guest machines from an Ubuntu Server Host to a CentOS 6 Host machine. My intent is to keep the guests as Ubuntu Servers and just change the OS of the Host. I've moved the ...
4
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1answer
1k views

Running ipmitool as a non-root user

I want to monitor some hardware-related data on a headless CentOS6 server. More specifically, things like voltages, fan speeds, thermal data... Since the server is headless, the best way I found to ...
5
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2answers
1k views

Modify XFS filesystem creation parameters during kickstart installation

I'm streamlining the kickstart process for a series of EL6.2 (RHEL, CentOS, SL, etc.) systems. I'd prefer to use XFS over ext4 for the growth/data partition. However, I'd like some control over the ...
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1answer
396 views

libapache2-mod-auth-pgsql and ssl-cert equivalent in CentOS

I switched this a time ago from Ubuntu to CentOS. Now, I faced this problem: Trying to install a software that I installed before in Ubuntu, I stopped at the point where I need to install the above ...
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1answer
1k views

What is the need of 2 dvd images in centos 6.2? [closed]

I have downloaded centos 6.2 via torrent.Then i got 2 dvd images.Then what is the use os second image. How to use it?
0
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1answer
433 views

Dovecot, maildir on Windows 2008r2 NFS share

I'm really banging my head on this one. I have a CentOS 6.1 running postfix/dovecot accessing a Windows 2008R2sp1 NFS share. In a test where the Windows server is a stand-alone file server, I can ...
0
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1answer
699 views

How to add a extention to the php.ini file

Hi have Centos 6 installed and busy installing wkhtmltopdf, I only have one step left and that is to include extension=phpwkhtmltox.so to the php.ini file, I added it to /etc/php.ini and reloaded ...
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4answers
7k views

how to change screen resolution in rhel/centos 6?

I have cent os 6 dvd installed on my computer.my monitor resolution is 1920 X 1080. i cannot increase screen resolution to 1920 X 1080. system->preference->Display can give maximum resolution as 1280 ...
3
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2answers
2k views

How can I make a CentOS 6 AWS AMI from a loopback?

I am able to make a Centos 5.x AMI by following steps similar to those outlined here: http://docs.amazonwebservices.com/AWSEC2/latest/UserGuide/creating-loopback-s3-linux.html and detailed here: ...
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1answer
3k views

MySQL ERROR 2026 (HY000): SSL connection error

I have enabled SSL on MySQL 5.1.52 on CentOS 6.0 using the following guide: http://www.madirish.net/node/244 I have followed the instructions correctly but I am running into the following error when ...
2
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2answers
521 views

Permissions somehow block access to files in CentOS 6

A friend of mine hosts some of the websites he has built for his clients. Somehow he messed up the permissions giving all clients' websites a 403 error upon loading. When I ssh to his server and log ...
0
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1answer
1k views

Postfix issue with relay access denied - I HAVE READ ALL similar cases and tried almost everything

this is first time I set up a server from scratch and I consider myself a fast and good learner for new stuff, so I did my best to setup postfix with dovecot in CENTOS 6, so I'm getting relay access ...
0
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1answer
249 views

Add Httpd service by linking to source install apache2

As title says, i need to add a service httpd to get the php and apache2 talking to one another it seems (by line in httpd.conf: AddType application/x-httpd-php .php) I uninstalled the default httpd ...
3
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4answers
1k views

Reloading a kernel “live” in CentOS / RHEL 6

When upgrading the kernel package on CentOS or RHEL 6, is it possible to load the new kernel without rebooting? My gut tells me it's not, but if it were, it'd be handy - especially when compiling ...
3
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3answers
8k views

Why is dhclient issuing a unicast DHCPREQUEST every ~15 seconds instead of at T1/T2 timers?

I am running a CentOS 6.2 server as my gateway and firewall, while also providing some internal services. This is a setup I have had for years using various hardware and distributions (redhat based). ...
10
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3answers
9k views

Virtualbox centos no eth0

just installed a fresh centos-minimal and i can not get bridged network to work or any of the networks not even in host-only mode. when you run ifconfig there is no eth0 only a lo, also when you cat ...
2
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2answers
2k views

CentOS 6: Can not start NFS

I am unable to start the NFS service. When starting there is no error. But the services are stopt after it. No messages at all in /var/log/messages. Same happens to rpcbind serivce. Any idea what this ...
6
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3answers
6k views

CentOS 6 Minimal or Hardened Install

I am working on building some new CentOs 6 servers and creating documentation for the installation of said servers. I would like to create a base CentOS 6 server install that would be light on the ...
1
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3answers
475 views

CentOS Template for Server Builds

I am working on building a new virtual machine with CentOS installed on it. It takes a lot of time to setup and build servers to include all of the hardening steps, service changes, custom monitoring ...
0
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2answers
842 views

SMTP server rejects connection without SSL enabled

Setting up a new CentOS 6 server with Plesk 10.4.4 using Postfix, I am unable to send emails from any user account on port 25, 465, or 587 without having SSL enabled. If I check to use SSL in Apple ...
3
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1answer
153 views

Server Unresponsive with Spike in Multicast Packets Received

I got a server from UbiquityServers about a week ago, I installed a simple Apache server and it just serves up images. The server is under very little load because it simply is an origin server behind ...
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2answers
2k views

On CentOS how do I get boost header files installed?

What CentOS 6 package name do I need to install boost header files: yum install boost doesn't seem to work. Is there a special compiler directive I need to use to point to the include files? Or is ...
3
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3answers
418 views

IPTables Config to Drop/Reject IPs based on attempts

I was reading over some of CentOS's documentation in regards to securing SSH and I noticed there was a rule you could implement in IPTables to DROP IP's that attempt to access your SSH port based on a ...
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0answers
633 views

Configure PolicyKit to allow non-local user to perform administration tasks that require authentication

On linux with policykit, if you try to use most GUI-based administration tools over a remote connection, they refuse to authenticate. I believe this is an issue with policykit (for example, ...
0
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1answer
33 views

Hosts names get clear on network/pc restart

I have nginx set up in my cent os and setting up virtual domians apart from localhost: test.pluspro.com test2.pluspro.com. after adding the domains to the /etc/hosts file in the system they ...
2
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1answer
712 views

virt-install kept on adding --no-reboot - even though I don't want it to

I have a bit of a problem getting my guests to reboot after the OS installation using virt-install. For whatever reason, virt-install insists on inserting "--no-reboot" when you create a VM: ...
2
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3answers
7k views

CentOS qpidd default network service

I just did a clean minimal net install of Cent OS 6. I did a netstat just to see what was listening: tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1165/master tcp 0 0 0.0.0.0:5672 ...
1
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1answer
579 views

Unable to start puppetmaster on CentOS 6

I installed puppet 2.6.12 on CentOS 6. When I try to start the puppetmaster service using the command service puppetmaster start I get the error: Starting puppetmaster: ...
3
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2answers
983 views

iptables-save fails to write to file

I can run iptables-save and dump output to stdout but if I redirect to a file - the file is empty: [root@nhd-vlx2 tmp]# iptables-save # Generated by iptables-save v1.4.7 on Sun Dec 18 ...
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0answers
778 views

Adaptec 5805 on Centos 6 IRQ 16 error

I'm having a problem with Adaptec 5805 raid card http://www.adaptec.com/en-us/support/raid/sas_raid/sas-5805/ (with two SAS discs in raid) and Gigabyte motherboard GA-H67A-D3H-B3 ...
2
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4answers
1k views

Possible NXDOMAIN hijacking?

I have two web servers at our colocation running CentOS 6.0. One runs our main marketing web site (production server) and the other is a staging server for the production server, so almost an exact ...
0
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2answers
2k views

How can clear cache in eAccelerator?

I can't clear the cache in eAccelerator. I have deleted all files from the directory /var/cache/php-eaccelerator/* with the following command: rm -rf /var/cache/php-eaccelerator/* But this does not ...
1
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1answer
188 views

Output of groups different then id

I'm sure this is something simple, but I can't for the life of me figure out what is going on. We are using NIS (haven't had a chance to migrate to LDAP) and for some reason the groups aren't being ...
1
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1answer
4k views

How do you set a DATE variable to use in a log for crontab output?

I was playing aroudn with some variations of date like DATE = $(date) but that didnt work either crontab -e CRONLOG=/tmp/log/crontab.log DATEVAR=`date +20\%y\%m\%d_\%H\%M\%S` * * * * * echo ...
3
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1answer
4k views

Linux - CentOS6 - semanage - command not found

I am trying to solve an issue where my HTTPD is denied access to binding custom ports and I believe it has to do with SELinux. Whilst doing some googling I came across some posts where users were ...
4
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2answers
2k views

bonding driver broken on centos6?

I have a server with minimal installation of CentOS6 64bit (minimal option from the installer). The bonding driver does not seem to work correctly. The output from /proc/net/bonding/bond0 is: Bonding ...
1
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1answer
3k views

CentOS6 - httpd - mod_file_cache

It appears that CentOS 6 no longer supports a few apache modules (mod_file_cache, mod_mem_cache, and mod_imagemap) according to their docs. What's the best way to handle this? Just remove the ...
0
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1answer
558 views

Memory missing? Centos 6 x64

after upgrading a server from centos 4 to centos 6, only 8 out of 12 Gb are available to the system; I thought some were faulty but it's not the case (i tried to swith memory with another server) I ...
3
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2answers
8k views

SSH sessions terminate abruptly with message: Corrupted MAC on input. Disconnecting: Packet corrupt

We have a Dell PowerEdge 840 Server running CentOS 6.0 64 bit with 2GB ECC memory. When any user sshs in, after some time the session gets terminated with the output: Corrupted MAC on input. Packet ...
2
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1answer
3k views

Nginx + uWSGI + Django performance stuck on 100rq/s

I have configured Nginx with uWSGI and Django on CentOS 6 x64 (3.06GHz i3 540, 4GB), which should easily handle 2500 rq/s but when I run ab test ( ab -n 1000 -c 100 ) performance stops at 92 - 100 ...
1
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1answer
2k views

How to set a network interface as 'trusted' on Centos 6 (with multiple interfaces)

I have a box with two wired network interfaces. On Centos 5 I could run the setup command in console and set which interface is trusted and which not in the firewall configuration (e.g. eth1 trusted, ...
2
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1answer
863 views

How to construct SELinux rules for a Glassfish server

I'm running Glassfish 3.1 on a CentOS 6 solution and by default SELinux is enabled. I have installed Sun's JDK version 1.6.0_29 on the server and extracted the Glassfish 3.1.1 to /opt/glassfish-3.1.1 ...
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1answer
3k views

CentOS6 system-config-packages missing?

I've just installed CentOS 6 with gnome but the graphical package manager no longer appears to be there. I've tried installing both system-config-packages and pirut using Yum but neither finds ...
2
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3answers
4k views

Compiling realtime kernel from RHEL 6 MRG sources on CentOS 6

I'm trying to compile kernel-rt-2.6.33.9-rt31.75.el6rt.src.rpm from RHEL6 MRG source RPMs on Centos 6 x86_64 system. It's first time I'm doing this, so I did research on how to do this properly. From ...
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2answers
175 views

Connecting to CentOS Server from outside fails if server has been idle

I got a strange problem with the network connection of a Centos 6 server: From LAN everything works as expected (SSH, httpd) but outside connections fail if the server has been idle for a few ...
1
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3answers
10k views

Changing the maximum mail size in Postfix

When sending large email to a new CentOS6 server running Postfix as the MTA, the following message is returned: tried to deliver your message, but it was rejected by the recipient domain. We ...
3
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2answers
337 views

General Protection Fault error on Centos 6 while executing a python script

I have a python(fabric) script running on a centos 6 box that parses configuration files and daemonizes MRTG process and dumps rrd files a folder in a shared file system. All goes well but midway to ...
6
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2answers
12k views

What is the correct way to load modules for iptables on Centos 6

Where should I load iptables modules, for example ip_conntrack and ip_conntrack_ftp. Places I have found that might be candidates, but are they? The IPTABLES_MODULES variable in ...