Questions specific to the CentOS Linux distribution. Use this tag if your question relates to how the CentOS distribution affects your problem; do not use it if you just happen to be using CentOS and your question is about a specific configuration detail or syntax.

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290 views

CentOS hangs after installing CUDA 7.5 + Nvidia 352 driver

I am having a very hard time getting the nvidia driver to work with CentOS 7. I have a GTX 960 which I run my display off of (I also have a GTX 720 which I just use to debug cuda apps but it is not ...
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96 views

Centos 6 KVM network problem

I have a Centos 6 KVM host. I installed the KVM following this manual: https://wiki.centos.org/HowTos/KVM Its network has been configured as a bridge: [root@server ~]# ifconfig br0 Link ...
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56 views

Can't log into Centos

I have a CentOs 6.5 mail server which was compromised and used to send spam therefore forcing us to do some hardening. I followed enter link description here hardening tutorial to the letter which ...
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27 views

Error installing Zoiper in CentOS virtual machine

I'm trying to install zoiper on my CentOS virtual machine but when I finish installing it, this pops up and zoiper terminates:
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26 views

Terminal Crash after upgrading from centos5.9 to 5.11

I had installed Centos 5.9 in my x86_64 system and I installed update yesterday. Just now after I initiated the system, I found it has been upgraded to centos 5.11. But the bad thing is now I cannot ...
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41 views

cant access php info page

very new to Linux here and having some trouble getting going. I have installed Apache, PHP, and mySql. Im trying to show the phpinfo page. In my /var/www/html directory I have created the phpinfo.php ...
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365 views

Installing Docker on CentOS

I'm working through the docker installation guide. Running centos 7. I ran curl -sSL https://get.docker.com/ | sh Output warning: ...
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21 views

centOs -install PPTPD on CentOS stuck on applying firewall rules

I've a centOs 6 and I want to install PPTPD vpn on it . I read this article and tried it http://etapien.com/guides/how-to-install-pptpd-on-centos-vps/ When I run ./pptpd6.sh comment to install it , ...
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30 views

Monitoring dashboard for a custom application, should also allow custom actions

I have a custom application, for which I need a dashboard which will monitor the application (show if the application is up/down) and allow an operator to start/stop the application from the ...
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26 views

Replicate CentOS server to AWS

Have a CentOS 6 LAMP web server currently running on on-premise hardware. I'd like to replicate or image this server to a VM in AWS for backup purposes. Is this possible? If so, what tools would you ...
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16 views

How to create Cent OS 6.5 DVD with the 3.10 or 4.0.1 Kernel?

The Cent OS 6.5 comes with a old 2.x kernel. I would like to build new kernel for it(3.10 or 4.0.1) and re-package it with the Cent OS 6.5 OS DVD. How can I do this?
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31 views

X11 Server Cap Lock and scrolling problems on CentOS 6

I am having problems with the cap locks key, when using vncviewer to remote on to a CentOS box running X11 v0.9.13-8. I cannot upgrade the x11 as i'm stuck on CentOS 6. The problem is that the Cap ...
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20 views

Is it possible to install centOS 5.7 over NFSv4?

I have an NFSv4 server running on RHEL 7 and need to PXE boot some machines that require CentOS 5.7. Considering that the older distro's can normally mount NFSv4 locations by specifying t=nfs4 I ...
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201 views

configure command line mail client in centos 7

I have installed mutt. .muttrc file is not located in home directory Need to configure mutt as mail client where as mail server is MS exchange server. Error Message : Diagnostic-Code: X-Postfix; ...
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120 views

Can't enable network adapter

I just installed CentOS 6.7 basic server on my z97a gaming 7 4970k. I can't get the network to work. ifconfig only shows lo. ifconfig -a only shows lo. I tried to create the eth0 and resolv.conf files ...
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166 views

Can't compile php 5.3 on Centos 6

I need enable php-fpm on php 5.3.29 to Centos 6, I have this error while running the ./configure script: ... config.status: creating sapi/fpm/php-fpm.conf config.status: creating ...
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29 views

Config folder for a service

Context When running the Deluge daemon (deluged) as a service, you can specify an option to where the config folder will be created. The deluge-user I've created, is a system account, and therefore ...
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107 views

How do I increase my network perform on Centos 7

I am doing some research and I find that I have to configure the sysctl.conf file if I want to increase the network performance. So, I want to configure the default maximum Linux TCP buffer sizes ...
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63 views

Linux capabilities for java to resolve symbolic links

I run a java program by a non-root user. The program has to resolve a symlink to the real file name, but the link is owned by a different non-root user. I used setcap to set capabilities to open ...
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134 views

build memcached source on centos6.4 64bit fails

I'd like to build memcached from source on centos 6.4 x86_64 but only get following error. checking build system type... x86_64-unknown-linux-gnu checking host system type... x86_64-unknown-linux-gnu ...
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135 views

replacing windows 8.1 with CentOS 7

A new computer came pre-installed with Windows 8.1. It is an Acer Aspire T desktop. I would like to completely erase windows 8.1 forever from the machine, and replace it with CentOS 7. How can I ...
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60 views

Installing foreman 1.9 configuration help

I can't seem to find the answer that I am looking for so any help here would be hugely appreciated. I am doing a POC with foreman 1.9 on a CentOS7 server. Our infrastructure as it stands right now as ...
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220 views

CentOS 7 installation falls back to text-mode on Parallels Server Mac VM

Every time I am trying to install CentOS 7 in Parallels Server Mac, the installation wizard falls back to text-mode. I am getting this error: X startup failed, falling back to text mode ...
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137 views

Can't install additional debug infos in the CentOS 6.7

I am attempting to debug coredump of the some application on the latest CentOS 6.7 and gdb gives me hints that some debug infos are missing, for example: Missing separate debuginfo for ...
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49 views

SASL fails to with against LDAP

So I am running into a whirlwind of issues with my cyrus install. I am setting up a multi-domain kolab groupware solution. I am on centos 6.7 I am getting this flooding my error logs when I try to ...
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350 views

CentOS DNS Server for localhost

I need install the DNS Server (BIND - CentOS 7) to work only locally. I mean, the same CentOS that has the BIND will connect/search in the DNS, any other host will 'connect' with this machine. The ...
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108 views

vpn connection was failed

I have CentOS 6.6. I used a Cisco compatible VPN (vpnc), but after I made a VPN and clicked on it, I got the following error message: the vpn connection "1" was failed" Then, when I used this ...
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56 views

What are the steps to migrate from GRUB to GRUB2?

I have a fresh installation of Scientific Linux6/RHEL6/CentOS6: I have /boot with boot loader and / with all else (which are sda1 and sda2 partitions of one hard drive, on a fresh, real system). I ...
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37 views

How do I track down why my system is unstable?

I am experiencing a problem where I use Chrome on my X220 with CentOS 7 (kernel 3.10.0-229.el7.x86_64). It begins when I've been surfing Chrome for a bit and have a few tabs open. Chrome may just ...
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27 views

How do I prevent application from auto-launching when logging in via SSH

Each time I login via SSH, the Mutt automatically opens. How do I prevent it from doing so? I have compared my settings on my staging server to the live server and cannot spot the difference. vim ...
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48 views

Internet connection proflem on CentOS and Redhat linux

I am new on CentOS and installed dual boot with windows 7. I am using a local isp internet on my windows7 system but can't access through centos. On centOS system, using the same IP, DNS, and Server ...
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244 views

allow non-root user to run programs compiled by root in /root/bin

I just finished and installed ffmpeg installation on a centOS box via the guide made by ffmpeg themselves https://trac.ffmpeg.org/wiki/CompilationGuide/Centos As it turns out, ffmpeg was installed at ...
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52 views

Renamed mount point on CentOS 6

I have the following situation on my CentOS server. There are 2 HDD connected and mounted: Filesystem Size Used Avail Use% Mounted on /dev/xvda1 9.9G 7.7G 1.7G 83% / none ...
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774 views

FIPS integrity test failed

I recently enabled the fips module in my CentOS 6 machine using this guide. During reboot, the system halted with this error: SELF TEST FAILED (/usr/lib64/hmaccalc/sha512hmac.hmac) dracut: FATAL: ...
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113 views

yum update conflict rubygem-passenger-native-libs from passenger repository vs centOS updates

yum update on a puppet dashboard throws up following error. How do we resolve it safely? Error: Package: 1:rubygem-passenger-native-libs-3.0.19- 1.el6_1.8.7.352.x86_64 (passenger-centos6-x86_64) ...
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65 views

How to Configure freepbx and Matrix Eternity on PRI Line?

I need to configure freepbx with matrix eternity on a PRI line and setup 12 seats for making calls outside. Matrix Eternity Device is ...
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268 views

Latest Mono, XSP and Mod_Mono throwing error when executing mod-mono-server2

I have installed the following versions from source on Github (tagged releases) mono 4.0.3.19 mod_mono 3.12 xsp 3.0.11 Everything appears to install OK but when trying to Start apache I get the ...
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255 views

Using CentOS as a thin client

I have about 50 desktop PCs running CentOS. These will be used as "thin clients" for users to access their real desktops (VMs) using some flavor of NX technology. So, the PC on the user's desk is a ...
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250 views

Django WSGI setup causing permission denied issues

I'm new in the world of Django. I've been working on setting up WSGI to serve my Django project. It is working fine on my personal machine but on the server I'm having a hard time to setup. I'm ...
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21 views

Centos7 starting very slowly?

My Centos7 starts very slowly. I do not know what is the cause. This problem appeared after I upgraded it to a new version. Can you, please, help me solve the problem? If more details are needed I ...
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45 views

Zenoss pythonThresholdException error

Zenoss query here, first things first: I have a CentOS 5.6 virtual server hosting Zenoss 4.2.5 and I am experienced no compatibility issues with this so far - it does everything I need. The problem ...
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69 views

How can I confirm download status for yum update on RHEL5/CentOS5?

I have an older server/appliance running CentOS 5.x. When I run updates on it, yum shows something like this: The screen stays like that until all packages are downloaded -- no status or progress ...
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38 views

How should I upgrade php5.3.20 to PHP 5.4 or higher than in Centos 5.3?

I build a webs application by using Codeigniter3 which required PHP5.4 o higher than this version and hosted in Centos Linux 5.3. So how should I upgrade PHP5.3 to higher version? However what is PHP ...
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396 views

How to set the repo file properly to have lxde installed?

I want to have lxde installed on my centos 7 with the command. yum install -y lxde An error occur: Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: ...
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148 views

X will not start, Centos 7

I installed X/X11 and proceeded to install DWM on my X220. However, X does not start and I am having trouble figuring out why. I have posted the /var/log/Xorg.0.log file here: ...
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112 views

why can't install centos-6.6 such the way as centos-7.0 from usb-hdd?

Here is the file structure in my usb-hdd. ├── boot │   └── grub │   ├── fonts │   │   └── unicode.pf2 │   ├── grub.cfg │   ├── grubenv │   ├── i386-pc ├── centos-6.6 │   └── ...
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220 views

CentOS 7: Installation not starting

A couple of days ago, I downloaded CentOS 6 and played around with it to get a feel of this OS. I finished with what I wanted to learn and decided to go ahead and do a fresh install of CentOS 7. Heres ...
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41 views

How to run Padre after installing via cpanm?

./cpanm Padre It looks like I could successfully install Padre. But.. How can I start it? I installed it with a normal user, not root.. where is the start script? [user@notebook ~]$ find . -type f ...
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281 views

Zimbra Bind IP address change

My client physically moved their CentOS 6.5 servers to a different data center with a new set of IPs. Before moving, they configured Zimbra 8.0.7 from Admin console with new bind address where they ...
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108 views

ffmpeg libass CentOS 5.11

I just got a vps server and it has CentOS 5.11 and kernel 2.6.18. I need to install ffmpeg on it with --enable-libass. I have tried to compile but I'm having problems with libass because I have an old ...