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

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problem installing oracle instant client on my centOS machine

I have downloaded and extracted the rpm package instantclient-basic-linux.x64-12.1.0.1.0.zip from oracle website and extracted it in /usr/lib/ where the current path is: ...
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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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31 views

Linux (CentOS) corrupts my BIOS?

Ever since I switched to CentOS from Windows, I've had to replace the motherboard twice on my Thinkpad T430 - the system isn't able to boot or even run diagnostics or go into the BIOS settings. It is ...
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1answer
11 views

Get summary count of all patches applied to a server?

Is there an easy way to get a count of the total number of patches applied to a server over a time frame, or even in summary?
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8 views

What means “removing packages from package profile” in up2date in RHEL?

What does "... removing packages from package profile: ['package1', 'package2']" mean in RHEL, in the /var/log/up2date log? I thought it was dependencies, but the software is still present.
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12 views

Any one help me to configure LDAP in centos [on hold]

I need to configure open ldap server in centOS and client in ubuntu. can any one help me
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9 views

OpenVPN service on CentOS7

I installed openvpn through the RHEL repo on a CentOS 7 machine. Problem is openvpn is not installed as a service (ie nothing in /etc/init.d/ or available through systemctl). I could install from ...
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2answers
20 views

CentOS - how to look for dropped connections from NIC

I'm running CentOS 5 and sendmail. Sendmail serves as an MTA for a webserver on the same LAN segment. Most emails go through, but I do get several errors in /var/log/maillog that read: Oct 20 ...
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1answer
21 views

Why does my tunneled IPv6 connectivity drop after a short period of time?

I correctly setup a Hurricane Electric tunnel on a CentOS 6.5 VPS server (KVM). I use CSF (ConfigServer Security & Firewall) which acts as a wrapper for iptables and ip6tables, the default ...
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1answer
159 views

What is the purpose of avahi on a RHEL 7 server?

Running a server machine with CentOS 7, I've noticed that the avahi service is running by default. I am kind of wondering what the purpose of it is. One thing it seems to do (in my environment) is ...
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17 views

System not responding and ttyS0 (ttyS0) main process (1627) killed by INT signal

The system is not responding(Unable to do SSH or Telnet, even scheduled cron job is not running) if it runs for more than 5 days. The scenario is "the ssh session is opened and console is opened from ...
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14 views

Unable to Configure Quotas in RHEL6 & CentOS6- quotecheck returns error message

Unable to Configure Quotas in RHEL6 & CentOS6- quotecheck returns error message I've created new partition(/dev/sda6) and mounted it(on /hulk). Edited /etc/fstab file to give quotas on the ...
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5 views

How do I set kernel-ml default in CentOS?

I have installed kernel-ml package from http://elrepo.org/tiki/kernel-ml Now I have both the original CentOS kernel and kernel-ml. How do I set kernel-ml as default on boot? Thank you!
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71 views
+50

How can I dual-boot CentOS 7 and Windows 7 on SSD/HDD drive combo?

I'm currently running Windows 7 64bit as main OS and would like to dual-boot CentOS 7. I'm currently using two drives on my system, one SSD of 120G, and one HDD of 1TB. Windows is installed and boots ...
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16 views

WHM / cPanel - running startup scripts specific to user

We have a private server running CentOS 6 pre-installed with WHM / cPanel. We have 2 accounts setup - one for our main site and another for testing before deploying to live. Relatively new to server ...
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25 views

IPTABLES comment: No chain/target/match by that name

Facid with error when adding new rule with 'comment': # iptables -I INPUT 1 --source 66.***.***.78 -j REJECT -m comment --comment "Some" iptables: No chain/target/match by that name. Without ...
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27 views

Ext3 file system became read-only and server reboots spontaneoulsy

We noticed ext3 file system in our CentOS 4.9 server became read-only. We got the following error in dmesg: EXT3-fs: INFO: recovery required on readonly filesystem. EXT3-fs: write access will ...
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How to expand an iSCSI lun with targetcli on CentOS7?

I have a CentOS 7 machine with iSCSI configured. see ls output from targetcli below. I want to add disk02 to lun0 so that to the iSCSI client can see a total 869.16GB instead of 392.2GB Question: Is ...
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29 views

Setting up a wireless connection on CentOS 6.5 without NetworkManager

I'm trying to set up a wifi connection from my CentOS 6.5 system to a wireless AP, without using NetworkManager. This is a fresh installation, but yet I don't see any ifcfg-* files in ...
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23 views

Show Plymouth Boot Screen failed

I am not getting proper information about how to solve this thing. I am using Centos 7 i've installed one open source called OpenERP. all services are running now. I have one issue i.e. ...
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1answer
42 views

Cannot log into CentOS 7 as root

I have a CentOS 7.0 VM, running under VirtualBox. Set it up a few months back, nice to get it back, but not crucial. I have successfully followed the instructions from RedHat, but they seem to have ...
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1answer
30 views

how to install turnserver on centos 6.5 32bit

I get the following error while turnserver on centos 6.5 32bit. How can I solve it? [root@d turnserver-3.2.2.1]# ./install.sh libc.so.6()(64bit) is needed by libevent-2.0.21-2.el6.x86_64 annot add ...
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2answers
88 views

Where / How to install CentOS 7 for 32 bit system?

I have windows 7 with 32 bit system, and previously I used CentOS-6.5-i386-minimal to run centos on my virtual box, but now I would like to run CentOS 7 and it seems (if I am not mistaken) that there ...
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How to setup a KDE/Gnome-Remote-Server with CentOS 6

I am planning to setup a "terminalserver" for my *nix based administrators. I would like to have a number of users, either with gnome or with kde (based on their likings) who will connect to the ...
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19 views

Centos List connected computers/devices on network

I'm running on a CentOS and I would like to check to see what computers/devices are connected to my network. How would I be able to do that. I've tried nmap but I must have used it in the wrong order ...
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37 views

Grant FTP access to specific directory

I have setup CentOS on a box on my local network and installed httpd, PHP, Webmin (and UserMin) etc. I opted for ProFTPd and have opened up ports for FTP, Webmin and Apache. I can now access Webmin ...
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23 views

is asus Q87T motherboard compatible with Redhad Linux?

is ASUS Q87T motherboard compatible with RedHat Linux ?? I can't get answer both the two links below: http://www.asus.com/Motherboards/Q87T/specifications/ ...
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2answers
45 views

How to create my arbitary output? [closed]

How can I write a shell script that give me following output: Today is: Thursday, November 05, 2014 The IP for localhost.localdomain is: 192.168.141.140
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2answers
37 views

How to connect to a VPS without SSH.

I have a fresh VPS I just bought, for playing only. No risk of any kind involved, so I noticed that due to my slow connection I have to wait seconds to finish writing commands and opening/closing ...
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1answer
9 views

Veritus volume manager perl not avaliable

I am trying to install veritas volume manager on Centos 6.5 while running the script its throwing me Cannot find perl to execute
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38 views

Rolling back EPEL 7

I have a fresh installation of CentOS 6.5, and I accidentally added the EPEL 7 mirror, and performed a yum update. Is there an easy way to roll this back and add EPEL 6 instead? Update I ...
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28 views

Keyboard doesn't working in boot menu on VirtualBox

I've just trying use CentOS 6.5 LiveCD on VirtualBox but all my attempts fail. When the system starts I see "Automatic boot in 10 sec ..." - if I do nothing, the message disappears after 10 seconds ...
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1answer
39 views

How to install PySide package for CentOS 7

I'm trying to install PySide on CentOS 7. Seems pretty straightforward, enable EPEL repo, and install. Except that EPEL doesn't seem to contain a PySide package (yum install python-pyside fails with ...
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21 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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1answer
92 views

How can I update BASH [duplicate]

How can I update BASH? I noticed that there are version 4.2.45 env x='() { :;}; echo vulnerable' bash -c "echo this is a test" this is a test cat /etc/redhat-release CentOS release 5.11 (Final) rpm ...
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1answer
48 views

Cannot use free space in filesystem

I want to install a program but it says that there is not enough free disk space more than 11 GB although there is. df -h shows: Filesystem Size Used Avail Use% Mounted on ...
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1answer
56 views

IP Address not populating in eth0 in ifconfig

One of my servers at work does not connect back to us (so I can't SSH into it). I asked the person on the site to do numerous things: sudo /sbin/service network restart It comes up with this: I ...
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1answer
50 views

service command does not work in centos 7

I used to use service command for restarting, reloading, and checking status of service on centos 6.5 like below: $ sudo service nginx restart OK $ sudo service nginx status ...
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server can't read newly installed centos 6.1

I have a server that has 12TB and I used RAID 1+0(RAID 10) so my logical drive in the server is now 6TB + (6TB Mirror) when I install the CentOS v.6.1 in the server, the installation has no problem at ...
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29 views

Running centos on a virtual machine as a webserver

I have taken the VM image of our webserver (CentOS/jboss) and would like to run it locally on my mac as a virtual machine so I can use it as a webserver when I am offline - I am using VM Fusion. The ...
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1answer
83 views

Why does my systemd unit fail to run on server reboot?

I'm having troubles getting a systemd service unit file to run correctly when the server reboots. This server is a fresh CentOS 7.0.1406 install. I'm trying to set it up with multiple Apache httpd ...
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36 views

How to start teamspeak server on reboot as specific user

Linux version on the server is Centos 7.0. Teamspeak server runs with this command: ./opt/teamspeak3-server_linux-x86/ts3server_startscript.sh start My server doesn't have 100% uptime. Therefore, ...
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3answers
44 views

Change login user account when accessing server through Putty

I am a very new systems administrator. I have been hired in as a junior and came from a Windows administration back ground. I have about one month of Linux experience. I have a lot of resources that ...
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49 views

Can call login command from terminal

I want to create a user using useradd from root in my terminal window, after it I call passwd to set user's password. So I cant call login username because when I call it from terminal it closes ...
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68 views

Whitelist IP's in CentOS 7

I want to setup CentOS 7 firewall such that, all the incoming requests will be blocked except from the originating IP's that I whitelist. And for the Whitelist IP's all the ports should be accessible. ...
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32 views

Centos 7 - Encrypted installation won't boot

I installed CentOS 7 netinstall (minimal installation) on a VServer with the following partitions: /boot - 200MB - XFS / - 50GB - XFS Encrypted swap - 512MB - swap Encrypted I ...
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what would cause runcobol to fail for certain users?

I have RM/COBOL Runtime - Version 7.10.00 running on a CentOS 6.5 box (VM) This CentOS allows SSH access to certain domain users by authenticating their group with the local domain controller. These ...
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59 views

CentOS 7 Live CD?

On this video at 1.09 I see CentOS 7 Live CD which allows to start CentOS directly from CD without installing it. How can I make such disk? I've downloaded .iso file from official web site, burned ...
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75 views

CentOS 7 - Graceful shutdown via power button

I want to be able to shutdown my centos 7 machine by pressing the power button. Since it doesn't work out of the box, I tried the following: yum -y install acpid service acpid start chkconfig acpid ...
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128 views

How display log messages from previous boots under CentOS 7?

Executing journalctl under a CentOS 7 system just prints messages generated after the last boot. The command # journalctl --boot=-1 prints Failed to look up boot -1: Cannot assign requested ...