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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Connect to CentOS LAMP instance from Windows PCs

I have a CentOS 6 machine running on our network which has a simple LAMP installation on it. I have some files there which I would want to access through other Windows PC which I am able to do so ...
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6k views

Mirror repository won't work (The requested URL returned error: 403 Forbidden)

I'm trying to find out why I still get the 403 when running the yum install command. I have created a repository mirror which can be read from remote machines. Do you have any suggestions? I have ...
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341 views

yum install gcc fails with invalid linux.dropbox.com/fedora directory

I am relatively new to Linux administration. I have installed Centos 6.5 (under VirtualBox on a Win7pro system). When I try to install gcc to the system using yum, I get the following results: ...
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1answer
378 views

Permission Denied in Crontab

I've searched half a day for the answer to this, with no luck. Any assistance will be appreciated. I have a PHP script that modifies the crontab, loads a new cron job, removes some etc. The script ...
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2k views

Python2.7 / Pip2.7 install in Centos6: root does not see /usr/local/bin

I am trying to install Python2.7 in Centos 6. It's a pain as centos6 ships with python26 and yum is dependent on it. Furthermore yum does not seem to have python2.7 I ended up building it from ...
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1answer
93 views

Change order of two-factor-authentication

I am testing two-factor-authentication for ssh logins on some CentOS containers in our testing environment. I compiled my own rpms from github's source, installed and configured everything and have ...
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1answer
159 views

sfdisk can't create more than 4 partitions?

I'm running Centos 6 from command line, and I need to partition my disk using sfdisk more than 5 times. However I can't seem to create more than 4 partitions. >> sfdisk <scsi ID> --force ...
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76 views

Cannot jail ssh account using ChrootDirectory

I am trying to jail my accounts into their home directory. I tried to do: Match group accounts X11Forwarding no AllowTcpForwarding no ForceCommand internal-sftp ChrootDirectory %h ...
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1answer
343 views

Samba 3.6.9 on CentOS 6.5 existing user unable to connect to new share

I've got a question about samba connectivity. I installed a minimal installation of CentOS 6.5 and have it as a member server of AD, as per this guide: ...
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3answers
82 views

Open man page using nano

I want to open man pages in another text editor, in this case "nano". Does anyone know how I can achieve this please?
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3answers
3k views

How to install VLC media player in CentOS6?

I am using the CentOS, version 6, GNU/Linux distribution. I am in need to install VLC media player, what command i need to use at the terminal? I have tried yum install vlc.
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850 views

How to hide or remove the title bar of terminal in centos?

Want to remove the titlebar of the terminal. It would helpful if there is a way to generically do it for all the windows ? If not possible, still if it would be helpful if I can remove or hide the ...
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476 views

cannot connect centos (dell precision) laptop to 2 external monitors (but I can connect to 1 external monitor)

This is my first post here and hope I am following the rules of the forum. I reviewed Connecting 2 External Monitors to a Laptop? and confused with hardware terminology to figure out if my Dell ...
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1answer
190 views

ffmpeg subtitle not visible

I'm using ffmpeg static. I have to two servers. When i encode at the first server, subtitle works; but it does not work at the second server. I installed fontconfig, fontconfig-devel, freetype, ...
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1answer
150 views

Can I set-up sendmail on a LAN without a registered domain for testing mail?

I am running CentOS on a server at home which I use for development of Joomla websites. After they are developed, I move them to a hosting service. While developing the Joomla website on my home Linux ...
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2answers
221 views

Centos connect to virtualbox network

I have created a virtual network by using virtualbox and I would like to know how can I make Centos connect to it and have its own IP for example 192.168.1.102 because I have a windows 7 virtualbox ...
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0answers
148 views

Centos 6 Eclipse font rendering at 8pt

I am running Centos 6.4 and Eclipse Juno and I like coding at 8pt size. I keep seeing a few letters with no spaces in between them. I have tried DejaVu Sans Mono Book, Droid Sans Mono etc. The font in ...
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1answer
132 views

How can I finish the unfinished transaction, so then I can make all the updates?

I try to use yum update and everytime it says me to run yum-complete-transaction first to finish the unfinished transactions remaining. When I try, it loops like forever, and sometimes it ends by ...
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1answer
236 views

Move rvm/gems or make available to root

On a CentOS 6 server I accidentally installed rvm and a bunch of gems as non-root user. Everything is running well, however I'll need to run rvm scripts as super user later. I'd like to fix my ...
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0answers
255 views

Avoiding sleep when lid is close and no one is logged in

I've an old Dell Latitude laptop that I've converted to CentOS 6.5. As this is going to work like a server (i.e. no one will use it directly) I've changed from UI the power management option to ignore ...
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0answers
118 views

hadoop cluster high availability error couldn't find or load main class

[hduser@mn1 bin]$ ./hdfs zkfc -formatZK Error: Could not find or load main class ”-Djava.library.path=”.home.hduser.2.3.0″.lib” I did every step just like in this tutorial, TWICE. The error still ...
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1answer
20 views

Do cronjobs run in CLI?

I am running PHP 5.5 with ZendOPcache integrated. There are two options for this extension - is cache enabled (which I've set to true), and the second one - is CLI cache enabled, which I've set to ...
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1answer
386 views

Centos 6.4 network manager disappered

Hi I am using a Centos 6.4 Desktop and from today the newtrok manager stopped appearing and only appears if I run the following command "nm-applet" and keep the terminal window open in order for me to ...
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1answer
37 views

Linux Image to recreate a machine with the same configuration

I have a CentOS 6.5 machine with some installed packages , I want three more identical boxes to be setup and I was wondering if I can make an image of the one machine that I have pre-configured and ...
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1answer
59 views

red 5 recorder app set up

Does anyone know how to set up this Red5 Recorder application on Red5 1 RC2 for Linux CentOS 6.4? I followed set up of WEB-INF folder from this document http://fms.denniehoopingarner.com/newapp.html ...
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1k views

How to mount a iSCSI/SAN storage drive to a stable device name (one that can't change on re-connect)?

We need stable device paths for our Twinstrata SAN drives. Many guides for setting up iSCSI connectors simply say to use a device path like /dev/sda or /dev/sdb. This is far from correct, I doubt ...
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1answer
210 views

Making SSH connection to Centos 6.5 VM takes ages

I installed Centos 6.5 in a Virtual Box VM. Everything works smooth, except for SSH logins. It takes ages for the command prompt to display. With some verbosity added: debug2: kex_derive_keys ...
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3answers
9k views

Why Centos still not using Latest kernel

As i have seen many changes and improvement in kernel 3.xx The improvement i like is dmcache which introduced in kernel 3.9 I have 3 server with centos installed on all machine Centos is still ...
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1k views

generate a keystore file in CentOS

How do I generate a keystore file in CentOS? I basically used the following command to generate the keystore and keys: keytool -genkey -alias signFiles -keystore name however I get the ...
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1answer
257 views

yum install Libreoffice Writer without Java

Is it possible for me to yum install LibreOffice Writer without Java also being installed? I don't want to install the full libreoffice package because it prompts me to update my java and tomcat ...
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1answer
8k views

How do I execute/run a .sql file in PostgreSQL 9.2.6 + CentOs

I would like to know how to execute a .sql file in PostgreSQL. I'm using CentOs 6.4. I have created a database and just need to run a script given to me to create tables. Thanking you in advance.
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2k views

CentOS 6.4 console keyboard layout hotswitch

On an X-server-less CentOS 6.4 box (so no setxkbmap) I share with another person, the other person's name is much easier to type in a particular keymap. Ideally, there would be a way, on-the-fly, to ...
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125 views

No loader-wizard in ioncube installer?

Trying to install IonCube on Centos 6, and well whenever I download the ioncube, there is no installer like the tutorials say there are. I am following the digital ocean tutorial: ...
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1answer
2k views

kvm cpu0 disabled perfctr wrmsr - hangs

I initially asked this question on StackOverflow, but it was marked as off-topic and said I might get help here.. so here it is ============== I am currently running Centos 6.5, and tried to follow ...
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228 views

How to prepare a Centos ISO for creation of Xen domU guest with xl (not xm or virt-install)

I'm tearing my hair out. I will be scripting the creation of large numbers of small HVM (not PV) customer xen CentOS 6.5 guests on a CentOS 6.5 dom0. I therefore do not want to use virt-manager (I'm ...
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1answer
431 views

Centos 6 - Can't get out of safe mode

So I was going into safe mode from following a tut to fix the error Access denied for user 'root'@'localhost' (using password: NO) And I had issued the following command: mysqld_safe ...
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1answer
23 views

Filetype is NET? Other sites on server are “folder”

I am curious as to why two sites on my Centos 6 server are "NET" as the filetype. Does it make a difference vs a folder? Here is a picture for better understanding: As you can see, ...
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32 views

centOS is not reading windows8 partition while installing

I am installing centOS over windows 8 in dual boot mode. And I made 30GB free space through windows partition. But when I install centOS , it is not reading that partitions. It shows full hard-disk. ...
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20 views

RAM related errors on a CentOS server [duplicate]

I am getting a series of what appears to be RAM related errors on a server. Are these something to worry about? This is being used for scientific computation, is there a risk of data corruption that ...
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1answer
423 views

Input/output error reading file

I have a file that is 6.6GB, it just so happens to be a video file, and I'm trying to copy it to an external drive since its quite important for me to keep, however when I try copying it whether with ...
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229 views

Unable to log in with correct credentials from different locations into vps

I have a VPS running CentOs 6.4 with CPanel 11.38. At the moment my 2 clients can't log in to the mailserver from their location. I have done it myself and the credentials are correct. I can log in ...
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2answers
3k views

Setting up Samba4 internal DNS forwarder to try multiple DNS servers

Our network setup until recently was that we had a Samba4 server acting as a DNS server for a few internal names, and forwarding to our main router for everything else (i.e. stuff on the internet.) ...
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2answers
1k views

Always have to chown when adding new file? Centos 6

Whenever I upload a new file to my server, I have to chown -R apache:apache /dir in order for it to be accessible. Is there an easier way around this?
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1answer
7k views

Install packages in CentOS from DVD without connection to internet

I have a CentOS 6.4 system with no connection to internet. I have the installer DVD though. How can I install a package, say gcc, using this DVD alone?
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1answer
2k views

Why does ping to google.com or 8.8.8.8 fails

I am using Cent OS 6.4 and it is in a official lab. ping google.com gives the below output and hangs: [root@LAB1 ~]# ping google.com PING google.com (74.125.236.195) 56(84) bytes of data. ping ...
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1answer
6k views

How do I block all ports except 22 and 80 in Centos6.2 64bit

How do I block all ports except 22 and 80 in Centos6.2 64bit. thanks all.
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1answer
198 views

Centos 6 log errors, how to fix?

So for some reason all my images on my blog disappear, no idea why now, but the first time it happened I removed Varnish, and the images came back, everything worked fine. An hour later the images ...
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159 views

VPS IP redirects to website instead of the IP directory? CentOs 6

So before I started putting websites on my VPS, I could access the IP directly and it would access the html folder in the /var/www/ area. But ever since I placed websites on the VPS, I can no longer ...
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1answer
134 views

Disabled root login and no root users.. What to do? CentOs 6

So I was undoing some changes here on CentOs 6, and I ended up removing all users who had root access, accept for the root user. But then I realized the root login is disabled, and I just disabled ...
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2answers
9k views

CentOS: View all users in a specific group

I added a user user01 to a group group01 using: usermod -a -G group01 user01 When I run in command id user01 it shows that this user has actually been added to the group. However, the file ...