CentOS is an Enterprise-class Linux Distribution derived from Redhat Enterprise Linux sources freely provided to the public.

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Help required for LAMP Stack fail-over Configuration

I am using cloud servers of digital ocean for last some months. Recently One of my cloud servers disappeared from panel with backups @ ubiquity, the server co guys put it back after 1 day. However my ...
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61 views

Email Configuration in Cent OS

I have hosted my web application in VPS Cent OS. Its working well, in that application if a vendor registered or any events occurs between users and website, admin needs to send emails regarding the ...
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1k views

How to change SAMBA default port on centos?

I need to change the port numbers of samba. Our ISP is blocking the ports 445 and 139. So I need to run samba in a different port. Please help me to do that.
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1answer
80 views

How do you Configure Package Management System (YUM) for MongoDB

On the site (mongodb) it lists ... Create a /etc/yum.repos.d/mongodb.repo file to hold the following configuration information for the MongoDB repository: then... [mongodb] name=MongoDB ...
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1answer
190 views

pptpd dead but subsys locked? on cent os

i install point to point tunnel (PPTP) in my VPS. (Cent OS 6 64 Bit) everything fine after reboot the PPTP not worked client side. the pptpd status shows " pptpd dead but subsys locked ". how to ...
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180 views

Windows / Unix Share

I have a NFS + SMB share on my Win server called 'media' (same path). Both shares are read-only for guests - the Win server add files and both protcols can read them. Now things getting more ...
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1answer
265 views

No internet even with iptables ACCEPT all

I was trying to setup the firewall settings, and probably did something wrong. I don't have internet now unless I stop iptables service I tried flushing,and accepting everything sudo iptables -F ...
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527 views

How to use VNC for gaming?

I was just wondering if it's possible to set up a windows 7 VPS/VNC server to be used for gaming on my local network. I have a macbook pro as my main computer, it doesn't quite have the horsepower ...
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2answers
1k views

Best way to create RAID on an existing system drive

I want to add another disk as RAID 1 to test my database performance. I am trying to not re-do the whole system, is it possible? Currently I have a single 1TB HDD with one 100GB system partition (and ...
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2answers
2k views

Problem Starting MySQL on new Centos 6 build

I have a VPS with ChicagoVPS that's running Centos 6. Official version of the build is: Linux RedHat 6.5(Final 2.6.32-042stab078.26 x86_64) I followed this guide to add the repository and ...
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How to install PHP 5.2.4 in CentOS release 6.5 (Final)?

Folks I need to install PHP 5.2.4 in CentOS release 6.5 (Final). My souces list are: # CentOS-Base.repo # # The mirror system uses the connecting IP address of the client and the # update status of ...
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2answers
439 views

How to detect network connection failure?

I have a direct Ethernet connection between a Windows box and a Linux box. If I disable the connection on the Windows side Linux still seems to believe the link is up. Is this normal behaviour? I ...
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2answers
413 views

Create SSL certificate - Silent [closed]

I want to create a SSL certificate without get prompt for the data. The normal way to create the certificate would be: openssl req -x509 -nodes -days 7300 -newkey rsa:2048 -keyout ...
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3answers
5k views

CentOS kernel version 2.6.32-431.el6.x86_64 bugs

As far as I updated my centos ver 6.4 to 6.5, the new kernel (2.6.32-431.el6.x86_64) disappointed me! It hangs when I want to plug my external hard to laptop or hangs when I start virtual windows 7 ...
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171 views

Arguments against Ubuntu? [closed]

As someone who's been using Ubuntu for a couple of years now both in production and at home, when seeking answers to certain administrative questions for my systems, I often hear the "that's what you ...
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2answers
1k views

Static routes in route-eth0 ignored

Why might route-eth0 be ignored but route-eth1 not? Might be because eth0 is using DHCP and eth1 is statically-configured? I have some static routes configured in ...
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2answers
902 views

Need IP for my Virtual Machine

I want to scp to my virtual machine (CentOS 6) from my Windows 8 machine. I have installed VMPlayer and installed CentOS 6 on my machine. I have enabled Bridged adapter setting, but I still can't see ...
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1answer
349 views

kickstart copy file to new system

I've finished writing my kickstart file but one thing bugs me the whole day. I've searched all over the net, found numerous posts with different solutions and none of them helped me. I did a fresh ...
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1answer
1k views

Is there any IP messenger for Linux (CentOS)?

Currently am using a Linux (CentOS) machine. Is there any IP messenger for CentOS like iptux and Gnome IP Messenger?
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1answer
1k views

How do I read the output of `dmesg` to determine how much memory a process is using when oom-killer is invoked?

I asked this question: Running `sudo /sbin/service mysqld start` causes system to crash In the comments of one of the answers, a very helpful individual is asking for more information regarding how ...
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467 views

Running `sudo /sbin/service mysqld start` causes system to crash

OS: CentOS 5.10 Service: Amazon Web Services Attempted to remove MySQL 5.0 and install MySQL 5.6 I had a server set up, and was going to use MySQL, but it was was set up with MySQL 5.0. Since ...
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3answers
670 views

How to install easy_install using non-default Python Interpreter on CentOS?

I have downloaded, compiled and installed Python 2.7 on CentOS. I would like to download and install easy_install (and pip) for it but I am a little bit confused as to how to do that. How can I ...
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1answer
246 views

Changing network config during CentOS netinstall

I cannot find a way to change the networking information during a CentOS netinstall, when using the URL installation method. I always use a netinstall, and occasionally fat-finger the network ...
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1answer
140 views

Upgraded from CentOS 6.4 -> 6.5 and now permissions do not seem to work properly?

I allow my non-root user the ability to view my nginx access.log. I upgraded from CentOS 6.4 to 6.5 and now my user cannot view this file but the permissions still look correct. I removed and ...
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172 views

Why does CentOS even with its latest release ship older versions of apps such as Python 2.6?

Why does CentOS even with its latest release ship older versions of apps such as Python 2.6? What is the reason and logic behind it?
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181 views

Nameservers setup in CentOS 6

I have a domain registered externally from where I have my VPS, but I need to connect these two in order to have the domain forward to my host. I know that I have to take my host's nameservers and ...
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327 views

Software RAID 1 with dissimilar size and performance drives

Background I was experimenting with a home server setup in a small box I had that was supposed to be a media centre but never found much use. I installed CentOS 6.5 in a software RAID1 configuration ...
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2answers
687 views

USB memory stick failing to mount - Not Authorized

One of my customers uses a machine running CentOS 6.4 with Gnome 2.28.2. Whenever he plugs a USB memory stick or external hard drive into the machine he gets an error pop-up that simply states Unable ...
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190 views

CentOS VPS not starting after installing zPanel

I've had some trouble earlier installing zPanel, but then I was told that I've been using the wrong package, I was supposed to use the 32-bit version, but kept trying with 64-bit. After figuring that, ...
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1answer
406 views

Apache fails to start after changing cert and key

The problem appeared after I changed https certificate and key. sudo /etc/init.d/httpd restart shows this: Stopping httpd: [FAILED] Starting httpd: [FAILED] Apache's error_log: [Tue Dec 03 ...
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2answers
3k views

Strange error message during CentOS 6.5 installation regarding disk containing BIOS RAID metadata?

While attempting to use an old 40GB HDD to setup a kind of junky though usable Athon 1GHz system I ran into the following error during the HDD identification/partitioning phase of the installation: ...
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2answers
417 views

yum update presents hponcfg-4.2.0-0.x86_64 conflict

I am in the process of trying to get Cacti installed onto an HP DL360 running Centos 6.3. Running yum update presents me with a few updates but when entering y it returns an error. How can I solve ...
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174 views

how to set up ldap and trac

I have set up kerberos authentication with trac which works well. Now I want to use AD groups and users for trac permissions using the trac plugin Configuration for LdapPlugin. I have been following ...
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125 views

Configuring CentOS apache server to default to a specific port for ExpressJS and Node

Completely new to Linux and virtual private servers so please bear with me. I have a webapp built on ExpressJS and NodeJS that runs on port 5000 of my server, accessible via web by typing: ...
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1answer
2k views

How to troubleshoot No Sound on CentOS 6.4 w/ USB headset?

Have a new Dell machine with a fresh install of CentOS 6.4. I have a headset hooked up via USB, but no sound. I'm not sure CentOS is recognizing my sound card -- or maybe it's not recognizing the ...
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1answer
106 views

trac svn python bindings messed up rebuild python

My trac and svn used to work it still does if i click on the links many times. How ever it complaines of he followign and i am not sure what to do i have followed ...
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1answer
171 views

How to debug a device that changes from /dev/ttyUSB0 to /dev/ttyUSB1 at will?

I have a device plugged to a CentOS server that changes randomly from /dev/ttyUSB0 to /dev/ttyUSB1 and vice versa. The device I'm trying to connect is this one. How can I debug this?
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44 views

rpmbuild library register for 'requires'

Big Picture: I am building an in-house rpm for a customized php. I build an rpm which works, but generate library requirements that I can't seem to meet without using 'nodeps', which I want to avoid ...
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319 views

CentOS memory allocation

I was running my VPS with CentOS on 1G memory, but I saw the memory was getting "full" so I had 1G extra installed. This VPS is one I rent at a hosting company. That company did most of the ...
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586 views

enable SMART for HP hard disk

I would like to use SMART to perform a health check of my hard disk. I have an HP server of 4 years ago I believe. Everytime I try to use the following command smartctl -a /dev/sda I got an error ...
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1answer
2k views

Unknown DAV provider: svn

I did something wrong On my CentOS 5.9, I did the following: cd /usr/local/directadmin/custombuild ./build rewrite_confs But now I get an error restarting httpd: [root@1332 conf]# service httpd ...
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2answers
1k views

Where is the error page location of squid proxy server?

I'm using squid proxy sever on my ubuntu 12.04 LTS. Where is the error page location so that I can customize it..
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523 views

Installing Xcache-3.1.0 on CentOS 5.9 32-bits

I'm renting a VPS that is running suPHP, so my hosting company told me I can't install APC because of that. (I did not ask why.) So I wanted to test out Xcache and followed this guide for installing ...
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1answer
56 views

What is transaction check in Yum installation

What is the "Transaction Test" that will be done during installation using yum? Please explain with details..
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186 views

iptables - why the stun, turn ports are not working to allow end points to access the server?

I have this iptables where all working except tcp/udp port 3478 and 5349. $ cat /etc/sysconfig/iptables # Generated by iptables-save v1.4.7 on Thu Nov 21 10:21:41 2013 *filter :FORWARD ACCEPT [0:0] ...
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1answer
1k views

MySQL permission denied error even after setting security context for SELinux on VM

I have MySQL installed on CentOS (detail versions given below). My OS is a VM machine and not a physical machine, the directory /data/mysql is a local disk (virtual). I suspect I might need to do some ...
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75 views

foomatic-configure producing weird perl warnings

I am using CentOS 6.4 and trying to use the 'foomatic-configure' for print information and am receiving some weird errors: Perl: v5.10.1 foomatic: foomatic-4.0.4-1.el6_1.1.i686 Command line: ...
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How to install rtl8723ae firmware in CentOS 6.4

I am experimenting with CentOS 6.4 on an external hard drive. My main system in based on Ubuntu 13.04 and works well with the Wi-Fi (rtl8723ae) installed on My Toshiba C855 laptop. I have tried ...
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Configure Cent OS 6.4 so that desktop persists after closing VNC session?

I want to configure my newly bought VPS to be able to automatically boot into the Xfce window manager and let users connect to it via VNC and still keep the window manager running after the user ...
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744 views

Where are the CentOS 6.4 documents?

I'm only able to find up to version 5 on CentOS.com: http://www.centos.org/docs/ Even though CentOS 6 was released back in mid-2011..