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

learn more… | top users | synonyms (2)

0
votes
1answer
2k views

What variables are valid within /etc/default/useradd file?

My /etc/default/useradd file is as follow: # useradd defaults file GROUP=100 HOME=/home INACTIVE=-1 EXPIRE= SHELL=/bin/bash SKEL=/etc/skel CREATE_MAIL_SPOOL=yes man page for useradd provides many ...
0
votes
1answer
20 views

Exceeding memory issues on server using PHP

PHP has memory limits set at a global level in the PHP.ini file. I also know that they can be configured at the local level. Our memory limit for a query is set to 132MB, but we keeping getting ...
31
votes
6answers
55k views

How To Install Virtualbox Guest Additions On CentOS via Command Line only

Reading the Virtualbox user manual, I finally got [here], which explains how to install Virtualbox Guest Additions on a Linux guest via Command Line. But it's not clear enough for me (I just started ...
8
votes
3answers
13k views

What does eno mean in network interface name 'eno16777736' for CentOS 7 or RHEL 7?

Under consistent network device naming scheme, what does 'eno' stand for in network interface name 'eno16777736' for CentOS 7 or RHEL 7?
1
vote
0answers
21 views

mount: special device /dev/sda1 does not exist

I had a CentOS 6 server suddenly lock up on me after doing about 2 weeks of calculations for a project. Upon reboot, the machine would crash while attempting to mount the devices listed in the fstab ...
-1
votes
0answers
19 views

Need help getting GitLab to work on CentOS 7.2 [on hold]

I've got GitLab installed from the script on CentOS 7.2. I have apache setup with it. I'm not using nginx. I'm not sure why the web interface isn't working. Here is my config for gitlab and ...
0
votes
0answers
14 views

CentOS 7 grub option is missing after upgrading windows 8 to 10

My system was dual booted with CentOS 7 and Windows 8. After I reinstalled the latest Windows 10 Pro and removed windows 8, my system is only booting with Windows 10 as the Grub2 is not appearing at ...
0
votes
0answers
15 views

How to remove port number from nginx server url for video?

My video streams at foo.com:8080/foo.html On Centos where apache is also running. The video is in /users/share/nginx/html directory and the configuration file set to 8080 in /etc/nginx directory. ...
0
votes
1answer
4k views

How can I see settings of the email server?

I have root access to a Linux server (CentOS 5.10). I want to see the email server's settings such as whether SMPT is working, wheter there is an email server, port number, does it require SSL, what ...
1
vote
1answer
19 views

No entries for Ubuntu after executing update-grub on CentOS

My server is running Ubuntu 12.04 LTS from /dev/sda3 (ext4). I experimented with CentOS 7 some time ago and that is on /dev/sda2 (xfs) and its grub is used for booting. It showed only the latest ...
2
votes
3answers
1k views

installing eric5 in CentOS 6.4

I am trying to install Eric Python IDE 5 in my CentOS 6.4. The problem here is even I have installed PyQT4 its again saying that module is missing. what I am supposed to do ? here is the terminal log ...
-1
votes
3answers
119 views

How to increase disk space in root?

So I check on my server using df -h and my centos-root is at 99% capacity. Just a few days ago, the root is at 87%. For some reason, it increases so quick. Is there any suggestions on how to reduce ...
1
vote
1answer
13 views

Create Shortcut to VMware

How would I create a shortcut to VMWare player on CentOS 7 desktop? A lot of people say it's not possible to create shortcuts on Gnome 3, I have seen it working with a special file, but i'm not sure ...
1
vote
2answers
882 views

install opencv-2.4-9 on centos 6.5 with cuda 5.5 support

I can't seem to install opencv 2.4.9 on centos 6.5 with cuda 5.5 support. This is my cmake output: [root@cadejos-0 opencv]# cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/opt/opencv -D ...
1
vote
1answer
23 views

How to remove password prompt when executing su <user> command in CentOS 7?

I have two users in my CentOS system User1 and User2. I am logged in as root user and trying to add User1 to sudoer list using visudo. I have entered the following line at the end of the file User1 ...
0
votes
0answers
21 views

CentOS 7 i386 Netinstall error: 'Error setting up base repository"

I downloaded the 32-bit CentOS 7 Netinstall version from http://mirror.centos.org/altarch/7/isos/i386/, and used the http://mirror.centos.org/altarch/7/os/i386/ as the repository during installation ...
1
vote
0answers
25 views

Build CentOS RPM for current git release, unsuccessful rebuild with alternate prefix

I am stuck in an effort to provide an maintain an up-to-date git release for a collection of CentOS Linux servers. I was hoping to be able to create binary RPMs that I could just have published to a ...
0
votes
0answers
15 views

Firewalld / iptables on CentOS 7 - ports are not really being opened after recent update

My problem is that after a recent update I can no longer open any port. I have tried disabling firewalld and opening using just iptables. Ports are being "opened" as on the list that I have from ...
0
votes
1answer
11 views

“ Cannot find a valid baseurl for repo: base/7/x86_64” on “yum update all”

I am using Centos 7.1.1503 (core) as a VM. The host OS is Windows 10. I have created this VM, so this is a fresh installation of CentOS. My laptop has direct connection to the internet (no proxy) ...
1
vote
3answers
3k views

Install mplayer on Centos 7

I've been trying for several days to install mplayer on Centos 7 without success, I've install many repos but nothing works, I've always the following error: -> Resolve Dependencies completed ...
2
votes
1answer
2k views

Bridge does not get IP via DHCP at boot

I'm running CentOS 7. I'm not running NetworkManager, and I've actually uninstalled it. My system is supposed to acquire an IPv4 address via DHCP on br0 at boot. Howver, when I log in, it has no ...
3
votes
2answers
68 views

How to update Linux servers?

I am planning to update a bunch of servers. Currently, I get an email every month, on the updates that are available per servers. I don't want to check ~100 updates per server, is there a way to ...
2
votes
1answer
720 views

Ccan't connect to Samba drive in CentOS 6.3

#smbclient //ballzdeep/torrents Server not using user level security and no password supplied tree connect failed: NT_STATUS_BAD_NETWORK_NAME Does this mean I need to require username and password ...
0
votes
0answers
76 views

CentOS 7 blurry, fuzzy screen

I just installed CentOS 7 to Dell Optiplex 780 and I have problem with display. I am using two screens and they are quite blurry, fuzzy. You can see the problem (look at the terminal) - ...
0
votes
1answer
6k views

How can I extend VMware Partition on Centos 7 using GParted?

I've a problem with increasing a partition from 20GB to 120GB, VMDK file. Here is what I've done: using vmware-diskmanager to increase vmdk file from 20 GB - 120 GB. It's ok. download and boot from ...
2
votes
4answers
2k views

How do I set the group (gid) of a process I'm about to launch?

I'm porting a Debian init.d script to CentOS. In the Debian script, it uses start-stop-daemon for launching the process. The script uses start-stop-daemon's --group flag to change to a different ...
1
vote
1answer
28 views

Set Document Root for site?

Apologies up front for the silly noob question .... I have a CentoOS 6.7 server set up with Apache. I can confirm it is working correctly - say the machine's IP is 123.456.789.123, I can navigate to ...
5
votes
1answer
19 views

What are SELinux “.lst” files under /usr/share/selinux/targeted on CentOS 7?

I can see several ".lst" file under /usr/share/selinux/targeted on CentOS 7: base.lst modules-base.lst modules-contrib.lst nonbasemodules.lst ".lst" files contain a list of SELinux policy ...
1
vote
1answer
33 views

MySQL Access Denied (CentOS)

I have installed fresh MySQL server on CentOS, and started the MySQL server service with command. # /sbin/service mysqld start I checked the service and it is running. Currently I am logged in as ...
0
votes
1answer
686 views

ffmpeg -acodec copy does not copy all audio stream to the new container

I wish i can find ffmpeg help here at stackexchange. I'd been re-encoding old videos to libx264 to save up some storage space, as I thought it should be working based on documentation seems failing to ...
2
votes
3answers
150 views

Why does a yum package update replaces my yum-cron config files?

Usually, when applying package updates via yum update, rpm is 'intelligent' enough to respect my changes to configuration files under /etc. (It basically looks at the mtime, compares it and depending ...
0
votes
0answers
12 views

CentOS, Vhosts.conf missing? [on hold]

So I've created 5 pages on CentOS machine, I configured the Httpd.conf and vhosts.conf and everything works like a charm. Now after 3 months I log in and I can not find the vhosts.conf file ...
0
votes
1answer
862 views

Is not a valid path to the kernel headers?

Host - Windows 10 VMware - 11.1.2 Guest - CentOS 7 I installed kernel-headers using yum since during the installation of vmware-tools I get a message "Searching for a valid kernel header path... ...
1
vote
1answer
800 views

Need to install VirtualBox Guest Additions 4.3.8 in CentOS 6.3

My host system is OSX 10.9.2 and I'm running VirtualBox 4.3.8. In a Hadoop class I took recently, we were provided with a VM disk image preloaded with CentOS 6.3 and a lot of Hadoop-related ...
0
votes
3answers
87 views

how to get data of ntfs to linux?

I have dual boot of Windows 2003 server and Cent-OS 6.X on my PC. I have files in windows environment, can I get those files using any utility to my Linux environment with out using any external ...
2
votes
2answers
790 views

Unable to install dahdi - /usr/bin/install: cannot stat ‘’: No such file or directory

I am trying to install dahdi in my centos 7 system using this link but having some errors [root@localhost ~]# cd /usr/src/dahdi-linux-complete* [root@localhost dahdi-linux-complete-2.11.0+2.11.0]# ...
0
votes
0answers
47 views

Unable to install yum on cpanel server

I recently signed up on godaddy and have a user account on cpanel I can successfully use ssh to login to my server this is my operating system details when i use uname -a Linux ...
1
vote
2answers
238 views

Failed to join domain: failed to set machine kerberos encryption types: Insufficient access

did someone have this error when try to join CentOS 7 to Active Directory. I tried on a various ways(via cli, gui, tui) and always get same error. Failed to join domain: failed to set machine ...
0
votes
1answer
661 views

Change screen resolution of Xenserver Console for a CentOS VM

I need to increase screen resolution to 1024x800 for my XEN console. I tried to place vga=791 at the end of kernel line the file /boot/grub/grub.conf but it seems that most of the boot arguments ...
-1
votes
0answers
35 views

CentOS is not booting up [on hold]

I am using CentOS in a system which we can't connect to monitor. I edited the interface configuration files in /etc/sysconfig/network-scripts and used the command service network restart, the system ...
0
votes
1answer
24 views

Error starting Eclipse on Centos 6 (JVM terminated. Exit code=13)

After extract eclipse-jee-mars-1-linux-gtk.tar.gz and running eclipse I am getting following error. I have installed Oracle JDK. What would be the error and solution ? Java version [root@hithertech ...
2
votes
1answer
792 views

tmux unable to start a new session? “1;2c”

Introduction I just installed tmux onto my CentOS 7 machine, but I have encountered a bewildering issue. Whenever I try to attempt to start up a session using tmux or tmux new -s session-name, it ...
0
votes
1answer
111 views

IPA server configuration: Cannot use IP network address

I am stuck with an error while configuring IdM server for my environment. I got this weird error invalid ip address 192.168.1.77 for server.example.com: cannot use ip network address The error came ...
3
votes
0answers
26 views

Job queueing on a single machine

I have a shiny new server for running simulations on, with a pair of Tesla GPUs and 32 cores, running CentOS 7.2. I'd like for multiple users to be able to submit jobs to the server that get queued up ...
0
votes
1answer
26 views

I have no local IP on my CentOS 7.1 dedicated server

problem I've installed net tools and whenever I run ifconfig -a I come up with 2 network interfaces. Here is an example. [root@81756 /]# ifconfig -a eno1: ...
4
votes
0answers
15 views

journalctl process eating up memory

I have a process run by root journalctl -b --system showing up on htop that is eating a ton of CPU. I understand journalctl is for querying the journal, so is it safe to kill the job without impact on ...
0
votes
1answer
746 views

Big trouble : rpm empty db, install V3 RSA/SHA1 Signature, key BAD, YumRepo Error

I'm little tired because I have spent hours solving problems, and can't find a solution on Centos 6.6. I have many troubles: rpm db is empty: try googling, find restore process, but always empty ...
0
votes
3answers
44 views

How to change the Home directory of the currently logged In user

I am currently logged in into a CentOS server and I would like to change my home directory from /home/myuserName/ to /var/www/html/ I tried the below command : > sudo usermod -d /var/www/html ...
2
votes
1answer
13 views

Can I move 0yum-cron from cron.daily to montly?

I installed the yum-cron package, configured too only check for updates and then mail me. But, doing this daily, seems a bit too much. I would like to do this monthly. The file is located in ...
0
votes
1answer
16 views

Booting CentOS from live usb on OSX El Capitan

I have been trying to set up a live usb to use to study for the RHCSA/RHCE certification. CentOS launches and gives me the launch page I choose the standard option, I have not tried text mode etc. ...