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

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Centos web camera, fast application for snapshot?

I'm using ffmpeg for taking snapshots / still images with web cameras. I'm going to use several web cameras to take photos at the same time or one after the other (timelapse). It's important for me ...
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294 views

Port Forward For OpenVpn

I have setup a OpenVPN server on CentOS 6, and it starts ok when i /etc/init.d/openvpn start it shows me Starting openvpn: [ OK ] so far so good, but ...
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116 views

Dual displays, one fixed, one spinning (CentOS 7)

I have 2 monitors and would like to have my setup like this: Monitor = fixed desktop (only 1) Monitor = dynamic, spinning desktop (1+) It was working like this at the beginning but somehow I ...
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578 views

CentOS - upstart script is created, but its never running at all

I have this following setup but its not working in my CentOS 6x (3.10.23-xxxx-std-ipv6-64 #1 SMP Tue Mar 18 14:48:24 CET 2014 x86_64 x86_64 x86_64 GNU/Linux) Step 1: vi /etc/init/a.conf description ...
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45 views

Giving a user SFTP access only with access to subdirectory outside of home?

I have user [USER A] account which contains scripts and a downloads folder. I would like to create a new account [USER B] so that the user has read/write (SFTP and not full SSH) access to their home ...
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20 views

Huawei(e303s) installation in centos 6.4

I have installed CentOS 6.4 in my system. I connected Huawei(e303s) with airtel 3g,tried installing the driver provided with Huawei its getting installed with some error. It shows error like : The ...
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120 views

Tor install on CentOS server

I have followed the instructions provided here: https://www.torproject.org/docs/rpms.html.en However, when running yum install tor, i get the following dependency error: Error: Package: ...
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81 views

Download & install Report Lab on CentOs

I am following this link to install report lab and download parts of googlebooks as pdf. However, I am on CentOs 5, can not use apt-get, probably I need to use yum, but I do not know how. Any ...
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147 views

Why don't I hear audio playing from my CentOS 6.5 Vagrant box?

I want to play a wave file from my CentOS 6.5 Vagrant box using aplay and of course I want to hear the sound. This is what I do: > aplay sine.wav Playing WAVE 'sine.wav' : Signed 16 bit Little ...
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61 views

pip won't find system package on a custom location

I am working remotely on a CentOS system via bash with an account without administrator privileges and I need to install the Python package matplotlib. I can do this using pip install -t ...
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77 views

SNAT with firewall-cmd?

I have an interface with multiple IP Addresses (on CentOS 7), which is in zone "external" (with masquerade on). I want to specify that, if a connectiona attempt to a specific address goes out, to use ...
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34 views

Installing an OS from source on separate partition. Is this possible?

I'm trying to install Minimal CentOS on a small partition and the installer quits and brings me to a prompt every time. It says something like it can't find initrd.img. I was wondering if I could ...
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427 views

No volume groups found after restoring CentOS image to VirtualBox VM

I used Clonezilla to backup an HP Proliant server running CentOS 5.10. I restored the image to a VirtualBox VM but when I try to boot I get an error of "No volume groups found" "Volume Group ...
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269 views

Problems while executing slimerjs on linux (Centos 6.5 32bit)

I'm not used to work with Linux yet I wanted to try to use slimerjs on a Linux vps in order to have access to php exec function since most hosting companies disable that function. I did manage to ...
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235 views

Yum or Reposync: How can I slowly remove a repository without unintended dependency issues?

I have used reposync to create and maintain local copies of two repositories, remi and remi-test. These are repositories maintained by Remi Collet. On several systems in an internal LAN, I added both ...
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123 views

Get KERN_DEBUG messages into syslog on rhel7/centos7?

I've been trying to get KERN_DEBUG messages logged to a file in centos7, but have had no luck. I can get them just fine from "dmesg," but not /var/log/messages or /var/log/dmesg Here's a MWE kernel ...
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170 views

Datanode in slave isn't working : Hadoop in CentOS

We've created a Hadoop cluster of two machines following these instructions: http://tecadmin.net/set-up-hadoop-multi-node-cluster-on-centos-6/ with the machines set as follows: hadoop1 = master ...
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165 views

Set persistent permissions for /var/log/boot.log

Every time I reboot my CentOS 6.5 computer, it writes the boot log to /var/log/boot.log. The permissions on this file are always 644 after a reboot. I want the permissions to be 600. When I change the ...
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4k views

Redhat / Centos 7 Firewalld best practice for pptp or L2TP/IPsec rules

Having a quick look at Centos 7, and though I'd spin up a VPN daemon or 3, but immediately discovered the usual packages aren't yet in the core repositories, so had to dig around and found the ...
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186 views

How do you run CPU at turbo speed continuously

processor : 7 vendor_id : GenuineIntel cpu family : 6 model : 60 model name : Intel(R) Xeon(R) CPU E3-1230 v3 @ 3.30GHz stepping : 3 cpu MHz : 3299.670 ...
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111 views

How to route network in order to use internet on CentOs?

I have 2 computer in local network which have CentOS both. One has wireless card which can use internet connection. Other computer does not have internet connection. I want to route ip addresses in ...
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41 views

Passing Environment Variable to NetworManager GUI

My VPN stoped working when I switched to Centos 7. I narrowed the problem to the lack of MD5 support (not strong enough). I followed this thread, and now I can use open-vpn on the command-line to ...
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22 views

Why Would Spacing Matter in grub.conf?

See my earlier question. GRUB wouldn't recognize the XEN kernel until extra blank lines were added and the title of the GRUB entry matched the version of XEN installed on the server. I've always ...
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99 views

TPM passwordless boot

I'm trying to create device with CentOS6, encrypted disk (with LUKS), TPM module and TrustedGRUB to boot securely and without interaction. I'm following instructions from ...
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86 views

Virtual Host setup works for one server, not another

Having an issue with my virtual host set up. Used this tutorial as a reference on both: http://youtu.be/wXIJMtwmPCE Apache/2.2.15 (Unix) on both servers. Seemingly Identical httpd.conf file on both ...
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71 views

Unable to start apache

I'm running CentOS7 in virtualbox on a mac (osx 10.9.3). Ultimately, I want to acces the website on my Guest VM from my Host. I can Ping and SSH to VM but I can't acces the webpage when entering the ...
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1k views

openswan l2tp/IPsec VPN server (NAT'ed)

I have searched for a solution for this problem for a few days now and cannot seem to find anything close to my situation (server is always NAT'd and clients are sometimes NAT'd). I am trying to ...
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305 views

VIA “Chrome 9 HC” graphics card causes blackscreen on CentOS 6.5

I'm using Centos 6.5 (i386, fully updated) and get a black screen, when trying to startx. Debian was able to run a Desktop-Environment on the same machine. My graphics card is: CN896/VN896/P4M900 ...
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780 views

Samba 4.1.9 returning “access denied” trying to change share perms from Win client

UPDATE: version mismatch seemed to stop happening for some reason, although not sure why/at what point. Have a "public" (within LAN...like this) read-write share on a CentOS 6.4 box running, ...
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555 views

Help with lost software RAID5 on CentOS 6.5

I've been searching for hours and giving up / too scared to delete all my data. I have a file server running CentOS 6.5 which has 4 WD RED 2TB drives (all > 1 year old) in software raid 5 with mdadm, ...
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828 views

checking sendmail status as NON root user

I am in the process of converting to CentOS 6.5 from 5.5 and need a way to check if sendmail is on or not. For reasons I don't want to go through, I need to be able to check if sendmail is ON as a ...
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816 views

X11 connection rejected because of wrong authentication — on CentOS, for all users (including root)

I'm configuring a small computing cluster with CentOS. The last step is setting up X11 forwarding, and here I find problems that I cannot solve. On all compute nodes except one, I can set up ...
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104 views

Setting up traffic for GRE Tunnel

I want to set up clients that are behind NAT with a public IP but allow them to have one or more public IP's on their device. The idea is to have a linux box with either 1 or two network cards. Lets ...
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406 views

Improving TCP performance over a gigabit network

I have two machines both network cards speed is 10Gbps. The inbound bandwidth between the two machines is 10Gbps, the outbound bandwidth internet bandwidth is 500Mpbs. Both machines are using public ...
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747 views

Apache server: permission and symbolic link problem

I am using CentOS(Linux 2.6.32-431.11.2.el6.x86_64). I am trying to create an Apache2.2.15 web server. Every thing configured very well. My DocumentRoot is the default location i.e. /var/www/html. I ...
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3k views

mysqld dead but pid file exists

Webserver was running fine for weeks then suddenly: I can access, but I am unable to log into Webmin I can access Magento, a php-based storefront application, but I am no longer able to log in and ...
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231 views

ssh-agent on CentOS 6.5 keeps “disabling” itself

I recently installed git on my CentOS 6.5 system. During the process I setup a key/pair for GitHub so I don't have to enter a password for every git process. I did this by adding the rsa file to ...
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65 views

probably gfs2 problem

We have a Mail Server (CentOS 6.5) with these component: Postfix Dovecot Mysql MailScanner (spamassassin,clamav) GFS2 Partition Last night the server crashed and this is the kernel logs before ...
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580 views

VNC server on Centos 6.4

I have a Centos Desktop VM installed in Virtualbox, and want to connect to it using VNC. I have tried to install vnc-server, but could not connect. I removed it, then tried tigervnc-server, but same ...
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33 views

Can a RHEL 6.4 DS sync with a CentOS 5.4 DS

I have two CentOS 5.4 Directory Servers that sync information on a daily bases. I'm wanting to replace them with two RHEL 6.4 Directory Servers. Before the existing two are decommissioned all four ...
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1k views

CentOS 6.5 will not sleep after period of inactivity

I've recently upgraded my Ubuntu 12.04 LTS to CentOS 6.5. This is a desktop PC (non-server) that I would like to sleep/power down after a period of inactivity. I have the following settings in my ...
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153 views

Forward Only Email Server

I have a custom domain (I'll use the real domains cause I'm desperate at this point :) ) www.grantorino.io, and I want to forward all email addresses sent to yehiasalam@grantorino.io to ...
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116 views

Create partition on CentOS server?

I have a headless CentOS server that I'd like to create a new partition on so I have a separate boot and data partition. I have an existing server with the setup that I want to achieve and running ...
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172 views

how to install avxsynth on centos?

i am using centos 6 x86_64 and i am trying to install avxsynth for centos, but it always failed from link page i found that i have to install automake libtool MPlayer sudo apt-get install ...
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1k views

Error: cannot find a valid baseurl for repo: rpmfusion-free

I have a vps, and I try to run the comand in CentOs 6.5 32 bits: sudo yum install sd-agent And I Get: Loaded pluings: fasestmirrors Determining fastest mirrors Error: cannot find a valid baseurl ...
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589 views

How to install Liquidsoap & Airtime on CentOS 6.5?

That's the question, i already try some tutorials but i don't get any one to works What repositorys are needed? Is there any repo than i can add than have it to install it directly? Is there any way ...
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57 views

Assistance applying poorly packaged patches?

I manage a handful of servers running the various roles of a Ahsay online backup solution. A few times a year the software is updated and I need to apply patches on my servers. Annoyingly the ...
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151 views

How to disable PAE feature of kernel, after installation?

I am using RHEL 5.3(x86) as a base platform for my development purpose.My machine's spec is as follows: Intel, Core-i3 Processor @ 2.5GHz 4GB RAM Problem is whenever I am attempting to install the ...
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53 views

what interface does lpsched provide that cups does not?

Work has a Linux stock/erp custom system that uses the Unix System V (Solaris, SCO, HP-UX) lpsched program that someone who used to work here compiled for RHEL/CentOS 5 i686 (I have no idea why or ...
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60 views

Why CentOS 6 adjusts console width when running screen?

I run a console window through my PuTTY session. That console windows has a column width of 140. When I start the screen session, the console shrinks to 80 columns. I do not see this behavior on ...