CentOS is an abbreviation for Community Enterprise Operating System that aims to be compatible with its upstream source, Red Hat Enterprise Linux. CentOS 6 is the 6th major version of CentOS, which was released on July 10th, 2011.

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BIND named… unknown host

I have a very basic home network: A CentOS 6.3 server (storage, DNS, httpd, etc), a desktop, several laptops. I was running an old version of CentOS on the server for a long time (5.4 or something) ...
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78 views

rpm-spec and Home's user folder

I'm just trying to figure out how to know in an rpm package that calls sudo, and put some files in the non-root home folder for the users who call sudo or are root. I tried with something like this: ...
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Installing PHP 5.4 on CentOS 6

I want to update my CentOS 6 PHP version from 5.3 to 5.4 so I tried this guide: http://www.webtatic.com/packages/php54/ But after running yum install php54w I get this: Setting up Install Process No ...
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YUM Update error

I got a virtual machine with CentOS 6 on it. I've tried to run yum update, but I got this error: http://mirror.centos.org/centos/6/addons/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The ...
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CentOS 6 sshd: Logging in works, but still claims “access denied”

I have just installed a plain CentOS 6.3 system. I enabled sshd, and try to connect with Putty. This works, but here is what I get: login as: user Access denied user@192.168.1.7's password: Last ...
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927 views

Terminal menu bar hidden

I unchecked the menu bar option in the View of the terminal on CentOS. Now this terminal menu bar is hidden. Is there a way to get it back?
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264 views

Unable to boot Centos 6.3 from live CD

This seems a strange question to ask. The the same cd boots perfectly on one PC but gives the message- slab error in kmem_cache_destroy():cache 'Acpi-Operate':can't free all objects slab error in ...
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937 views

How to install centos inside virtual box using iso image

I am using oracle virtual box manager I created the virtual hard disk In Setting -> System -> Boot order selected CD/DVD-ROM has the first priority And in storage I did this changes while ...
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1answer
2k views

grub-install gives an error message I don't understand

I'm new to Linux, am using CentOS 6.3, and am attempting to install CentOS 5.8 ISO to a pen drive following instructions from here. My pen drive is /dev/sda and partition 1 is vfat. It's mounted on ...
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1answer
573 views

MPD Installation on Centos 6.3

I am in the process of migrating from Ubuntu Server over to CentOS. While I can easily configure MPD as a system wide service on Ubuntu, I am having difficulty with CentOS. Can anyone recommend a ...
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305 views

proxy servers with ips from various other countries

I am trying to setup a proxy server for a few members of my team. I want to give it to them through my VPS server, what I want to know is I want to give at least 30 IPs from different country then ...
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392 views

Why don't my certificates match?

I'm configuring a VPN with OpenVPN without interfaz, the problem is when I try to connect, it says: TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity) ...
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1answer
10k views

How to fix certificates verification creating a VPN (OpenVPN)?

Ok, I'll explain what I did... and at the end is the queston. THank you! To set up my VPN I installed OpenVPN in server and client machines. On server I configured the cert Authority in the file ...
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1answer
303 views

centos 6.2 VPS system encryption performance

My webapp database handles some user profile data (name, birthday, work and education history, email, facebook id, and also my facebook app secret that would provide any holder access to any facebook ...
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2answers
5k views

Unable to login from GUI in CentOS 6.3

I'm facing a weird problem now. Unable to login to the desktop and use the GUI. This problem is somewhat similar to Not able to login through the GUI but there weren't any autologon system enabled. I ...
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2answers
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Execute multiple commands in one line inside unix shellscript

The question is somewhat related to the question asked here, http://stackoverflow.com/questions/5130847/shell-multiple-commands-in-one-line, but the difference is, I need to execute the whole commands ...
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781 views

Passwordless ssh failed when login using username

I was trying to setup Hadoop and was stumbled on passwordless ssh to localhost. I am getting a password prompt when trying to connect using ssh username@hostname format. But there is no problem ...
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1answer
3k views

mysql workbench on centos 6

I've installed mysql workbench: sudo yum install mysql-workbench-gpl-5.2.44-1el6.x86_64 Then I've double-clicked its icon on the desktop, but after splash screen nothing is displayed. If from ...
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500 views

Screen stays on when laptop lid shut, running centos 6.3

I'm running Centos 6.3 on a Dell laptop, I'm not running a graphical desktop - just text mode. When I shut the laptop lid the display remains active with the backlight on, whereas I'm expecting it ...
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1answer
2k views

mdmonitor service issue in linux

chkconfig showing the output as mdmonitor service is running [root@localhost ~]# chkconfig --list | grep -i mdmonitor mdmonitor 0:off 1:off 2:on 3:on 4:on 5:on 6:off But ...
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290 views

Install mcrypt on CentOS 6.2

I want to install mcrypt on CentOS 6.2, firstly I tried yum but it cannot fined the package, then downloaded source file of libmcrypt-2.5.8 compiled and installed it by following commands: ...
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1answer
2k views

CENTOS 6 - How to install php-mysql when php-common @remi is present?

I am having troubles adding mysql support for my php installation, this installation was made using a ready to use-package that came with our VPS. This is my php.info: ...
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1k views

can we check remote login information using finger command

In man page of finger it's showing Finger may be used to look up users on a remote machine. The format is to specify a user as “user@host”, or “@host” so I tried [max@localhost ~]$ finger ...
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1answer
6k views

can't run lspci in centos 6?

trying to run lspci but it doesn't seem to be working? [Ramy@localhost ~]$ sudo yum install pciutils Loaded plugins: fastestmirror, refresh-packagekit Loading mirror speeds from cached hostfile * ...
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394 views

How to multiseat with HW 3d accel on CentOS 6.3 Final?

I would like to setup a multiseat configuration on CentOS 6.3 (two video cards, two keyboards, two mice, two monitors) and have hardware accelerated 3D on both monitors. 3D HW acceleration rules out ...
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Error In centos6 while compiling java classes,in tomcat6

I am newbie to Linux and Centos6. I bought server just now and want to deploy my web app in it. I am getting error while I am compiling my servlet classes. It showing me bash: javac: command not found ...
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2k views

Why is this cron not working?

I've made a script that backs some files up and puts them in a folder, When I do sudo /data/backups/scripts/nightlybackups.sh It works, I just want to make it a cron job so that it runs every ...
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204 views

Controlling USB media access on Red Hat or Centos Linux 6.3

I'm trying to control which users can use USB media (mass storage devices such as USB memory sticks and hard-drives) on Red Hat/ Centos 6.3 Linux. I would like something that is network wide, so a ...
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1answer
64 views

Windows 7 Networking with virtual machine

I have Windows 7 as base OS and i have installed Virtualbox to install CentOS 6.3. Now, since i am using DHCP for my internet use, is there any way through which i could give a static IP to my CentOS ...
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327 views

How to use 8 bit mode with NoVNC

I've got NoVNC running on Centos 6, and I can connect to it from my web browser without any problems. From some locations the connection is a bit slow, and I'd like to be able to drop back to 8 bit ...
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1answer
225 views

How to correct a screen wrapping around?

I got my hands on a Ubuntu System (which was displaying correctly) and I installed CentOS 6.3. The screen is wrapping around on itself. Any ideas? See for yourself
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476 views

Firefox script error

I downloaded Firefox (firefox-15.0.1.tar.bz2) file from this link Now That file is present under /opt directory, this is the permission of that file -rw-r--r-- 1 root root 19280364 Sep 17 15:33 ...
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508 views

403 Forbiden on Apache (CentOS) Server

These are my VM setup: HOST: windows 7 ultimate 32bit GUEST: CentOs 6.3 i386 Virtualization soft: Oracle virtualBox 4.1.22 Networking: NAT -> (PORT FORWARD: HOST:8080 => GUEST:80) Shared ...
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58 views

vim colour issue [duplicate]

Possible Duplicate: Remove VIM search highlight In vim, when searching for a string (using :/abc for instance), it will become highlighted with yellow, like this: After switching back to ...
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394 views

why page is automatically redirecting to some other sites

In my browser (Firefox 10.0.7) the page is automatically redirect to some other sites without clicking any link. If I enter the superuser.com url after pressing Enter button, It redirect to some other ...
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592 views

Login as windows domain user in linux through putty

How can I configure CentOS 6 server to allow login through putty using Windows domain login? I have root access to CentOS but I am not Windows domain administrator. My Windows desktop where I can ...
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2answers
595 views

How to restrict user from login saturday and sunday

I am trying to disable login from user avi on Saturday and Sundays, For that I entered this line in /etc/security/time.conf login;*;avi;Wd0900-1700 For checking this I changed system timing but ...
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1answer
344 views

How to display a message upon login to specific tty

In /etc/securetty I commented out tty2 and tty3: #tty2 #tty3 This succesfully disables root login for these two terminals for root. But is it possible to display a message such as "root login is ...
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How to add delay in autologin

I enabled autologin in my system (CentOS 6.2) for that I edited this file /etc/gdm/custom.conf In that I entered this code [daemon] AutomaticLoginEnable=true AutomaticLogin=test Here test means ...
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6k views

How can I install GNOME 3 on CentOS 6.3?

Would be possible to install GNOME 3 (instead of 2.28 that ships with CentOS) on a minimal CentOS 6.3 install? Is there any repository that provides packages for the new version?
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Without pam (Pluggable Authentication Modules) how linux system will behave?

Suppose if we create nologin file under /etc then only root can login, but if we comment on all pam_nologin.so line in every file under /etc/pam.d/ then other user also login. That means these ...
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2answers
306 views

What is the use of option -u in the Linux cat command?

In the man page of cat, -u means (ignored) [raj@localhost zzz]$ cat file1 hello world 1 2 3 4 5 6 7 8 9 0 ! @ # $ % ^ & * ( ) _ + ~ ` ; ' , .{ } [ ] = | \ / - [raj@localhost zzz]$ cat -u ...
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How can I manually control a fan from the terminal?

I'm trying to control the fan speed on my desktop, and I'd appreciate your help. Goal: Use a script to control the fan speed on my computer. Motivation: The embedded BIOS "Smart Fan" settings isn't ...
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1answer
614 views

low usb speed file transfer using KVM host CentOs

i'm using qemu-kvm(1.1.1) to run a Windows 2008 R2 Virtual Machine. The host machine is running CentOs 6.3. I'm exporting a USB 2.0 Hdd device to the VM using USB-redirection with spice channel. So ...
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921 views

What does / (forward slash) mean in cd?

I use the following commands to change directory and it generally works fine. [max@localhost max]$ cd / [max@localhost /]$ cd /home/max/ [max@localhost max]$ pwd /home/max But today, by mistake, I ...
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215 views

Environment variable changed

At first my hostname was localhost.localdomain in CentOS 6.2 I installed ubuntu in separate partition after that my hostname was changed to this ###-###-###-###-####.####.example.com In ...
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Setting reduced complexity passwords for a regular user

From root it is possible to set a single character password for any account Example: Here I created a account test3 and set the password t, and the password is accepted [root@localhost ~]# useradd ...
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2answers
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Setting up FQDN in CentOS 6.3

I have a domain name: example.com. I am setting up my CentOS 6.3 server's FQDN, it used to be centos63min. Reading on the internet, I found a lot of examples, where people name the server something ...
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688 views

Questions about setting up PHP-ODBC driver for remote SQL-Server-2008 connection on CentOS-6

I have CentOS 6 and PHP 5.3.3 VPS at GoDaddy. I have to interact with remote SQL Server 2008. I've seen many tutorials and quite lost here, so: There is a way to simply yum install it ? If not, what ...
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2answers
576 views

Linux cal command not showing proper output

If you type cal 9 1752 in a Linux terminal you will get strange output. For example: [max@avi ~]$ cal 9 1752 September 1752 Su Mo Tu We Th Fr Sa 1 2 14 15 16 17 18 19 20 21 22 23 24 ...