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

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Is it sensible to use multiple LVM layers with mdraid

I'm building up a home server that will be used for a handful of different things. I'd really like to try a Btrfs raid 1 array for a large data store, but I'm using CentOS 7 (older kernel although ...
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restrict access to certain directory lighttpd

how to restrict access to certain directory in lighttpd, block all ip's and only allow for my ip address. root directory is at /var/www . and i created /var/www/stats directory and symlink to ...
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Working with exporting PATH CentOS strange behaviour

I Trying to modify $PATH variable in two differents Scripts: The Scripts were located in: /etc/profile.d/ # gedit /etc/profile.d/php.sh & #!/bin/sh PATH=$PATH:/usr/local/php/bin export PATH # ...
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How to install Goldendict on CentOS 7

I've tried to install goldendict on my laptop which runs CentOS 7 on different ways: 1- I've tried to convert .deb package to .rpm with alien 2- I've tried to build from source (with error or qt4 ...
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Enable centos server to make FTP connection to other windows based server via php

When i am running this same code from my local wamp.Works fine and prints the result. //connection to a ftp server across proxy putenv('TMPDIR=/tmp/'); $ftp_server = "SERVER IP"; $ftp_user_name = ...
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How to change the login destination of a user in CentOS?

I'm having a dedicated server hosted with RackSpace, what I need to know is how to change the login destination of my user when I'm getting logged in to my CentOS using the PUTTY. When I'm getting ...
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19 views

yum update dependency in CentOS 6.6

After installing a rpm, by running sudo yum update in CentOS 6.6, I am getting the error Error: Package: qgis-python-2.8.1-3.el7.centos.x86_64 (neteler-QGIS-2.8-Wien) Requires: ...
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30 views

Centos 7/Gnome Applications menu items don't respond

I have CentOS 7 installed with gnome. After some uptime, no items under the 'Applications' menu respond.* I can open the menus and submenus and hover over items with the mouse pointer. They will ...
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19 views

Centos 7 GUI Freeze problem

I have installed CentOS 7 DVD ISO on my MSI GE70 Laptop that has geforce gtx 765m, when the GUI comes after 5 seconds screen freeze. Is this an nvidia problem? How can I solve it? I cannot disable ...
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Multiple NICs and Gateway CentOS

CentOS 6.6 eth0 IPADDR=10.0.0.100 IPADDR2=10.0.0.101 GATEWAY=10.0.0.250 NETMASK=255.255.0.0 eth1 IPADDR=10.120.0.100 GATEWAY=10.120.0.1 NETMASK=255.255.255.0 Gateway on eth0 has Internet access ...
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CentOs7 Python 3.4 Install Method

This post relates to this question where I was asked to explain how I installed python3 on my system. I was attempting to install python3 on my system for development purposes. Something went wrong ...
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9 views

Where does Knoppix store the location of hard drives/

I've been looking on the web and through the few Knoppix books I have. I cannot see where to locate the hard drives for a CentOS server I've booted with Knoppix. I am booting the CentOS server with ...
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looking for a way to download a list of packages with yum

We are trying to setup a local repo that contains all the base packages. So to get started we need to download around 3500+ packages and save it in a folder that will be used as a Repo storage. We ...
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15 views

Implications creating System Accounts “useradd -r” Linux Fedora/RHEL/CentOS

I want to know what are the implications of create an account using -r option? # useradd -r ... The help says: -r, --system Create a system account. System users will be created with no aging ...
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25 views

Disabled root Access, how to use FTP

I removed the ability to login using 'root' to stop brute force attacks on my server, instead logging in as a regular user then 'su root' to the root if required. I need to use FileZilla to move, ...
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15 views

How to make a background service to capture commands and their output?

Is there anyway to make a background service capture all the commands executed by a user and also save the output in a text file?
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3answers
135 views

Force all network traffic go through default gateway

I have a machine that I want to force all traffic to go through the default gateway. Even traffic on the local network. I have made it to work by removing the auto generated route for this interface, ...
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Centos Redhat Cluster LICI RUCCI

I have 3 systems [Normal Desktops College LAB] with 2 Network Interfaces each node1.test.com : Public IP : 10.10.10.2 Cluster Hearbeat: 192.168.1.2 node2.test.com : Public IP : 10.10.10.3 Cluster ...
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LVM volume inactive after reboot on CentOS

It seems like there are many people with similar problems, yet I've found nothing that could help me. I ask here in hopes that someone might have a good idea. I've reinstalled a linux server from ...
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How to mask IP address in linux Centos 6.6 [closed]

I have a server IP address and one application is running. Now I am running that application by typing IP address and port number in browser. So that application will running. What do I need? Client ...
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2answers
26 views

Upgrade Centos to 6.5 not 6.6?

We are running Cassandra, specifically Datastax's Enterprise version in our production CentOS environment. As such, I wanted to upgrade our machines from an older CentOS 6.3 version to 6.5, the ...
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1answer
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CentOs 7 Python Issue “-bash: python: command not found”

I asked this at stackoverflow, but just realized it might be best here. If I need to delete it over there or should not have posted here, please let me know. I am still new to this site. Thanks in ...
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22 views

Why is my CentOS 6 system doing IPv6 lookups?

I have a fairly recently installed CentOS 6.6 system. I have disabled IPv6 as best I can: IPV6INIT=no in ifcfg-[eth0|lo] net.ipv6.conf.all.disable_ipv6 = 1 in /etc/sysctl.conf ...
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46 views

Starting Tomcat Service when starts CenTOS/RHEL/Fedora

I want to install tomcat 8 and run it in startup time I following these tutorials: I created the tomcat user: # useradd -U -r -M -d /usr/local/ServerWeb/tomcat -s /sbin/nologin tomcat ...
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18 views

rsyslog adding unwanted text to outbound log data

I'm using rsyslog to send access & error log data to a remote server. The interface is in place, but I'm getting an extra bit of text in the outbound log data that isn't included in ...
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25 views

I have just made a 2TB CentOS vm but the disk isn't available

ok yesterday I made a fresh VM with 2.0Tb of disk. when I do df -H this is what I get [root@datastore ~]# df -H Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_datastore ...
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2answers
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CentOS future updates

We have been using CentOS as the OS for some of our linux servers for quite some time now. However, in a recent policy meeting, one of the colleagues said that there will be no more CentOS kernel ...
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how do I mount an external hard drive connected via SATA Wire to CentOS 7

I have CentOS 7 installed as a guest OS inside VirtualBox running on a Windows 8.1 machine. There is a SATA Wire connecting the machine to an external hard drive that used to contain a dual boot ...
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39 views

why are colors mixed up in CentOS 7 terminal?

I have CentOS 7 running as a guest OS inside a VirtualBox host. I opened a terminal to write some commands, but the colors are all messed up as shown in the following print screen: It looks ...
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1920 1080 resolution is not showing up [VBOX Cent OS 6.6] [duplicate]

MY /etc/X011/xorg.conf has the following configuration, but its not showing up 1920x1080 resolution in Guest centos 6.6 Section "Monitor" Identifier "Monitor0" VendorName "Monitor ...
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CentOS 6.3 - Firefox icon missing after reinstall

On CentOS 6.3, I have reinstalled FireFox to latest version using following set of commands: yum remove firefox cd /usr/local wget ...
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Centos 7 with facebook php-sdk4 - Network is unreachable

I am not sure why I am getting this error. Sometimes, it works and sometimes I get this error in the error log: Exception: Failed to connect to 1a02:1234:f000:4:face:b00c:0:1: Network is unreachable ...
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1answer
20 views

Trying to install a cluster, DHCP failing to start

Trying to install a linux cluster using this tutorial. I am running CentOS 6.3. When I try to start DHCP with service dhcpd start, it fails. I've used tail -f /var/log/messages and dhcpd -t, but I ...
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1answer
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How to exclude .jpg, .jpeg, .png, .gif from a ClamAV Scan (clamscan)

As the title says. I'm running a clamscan command to scan my users home directories, I'd like to exclude images from the scan as these sites specifically have thousands of images. M
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What is the equivalent CentOS for Red Hat Enterprise Linux 6.5?

According to CentOS website, they use the source code from Red Hat, but I am not clear about what version of Red Hat source code is being used to build each version of CentOS. Is there a numeric ...
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21 views

Have kickstart install TCPdump

I have a kickstart file for RHEL 6 and in the package section for the installing of the TCPdump command line utility I put tcpdump as the package name. Like I did with java and g++ in the kickstart ...
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Using rsync to Synchronize Directories

I have a script that I am using to backup a directory on a CentOS 6 machine. It's very basic but it is executing rsync -a remote:~/original ./backup Which works fine it is copying the contents of ...
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Creating Group and User for Tomcat RHEL/CentOS

I newbie I want to create an user for my Tomcat installation, but I was viewing multiple options: # groupadd tomcat # # useradd -g tomcat -d /usr/local/tomcat tomcat # useradd -g tomcat -c "Tomcat ...
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PuTTY does not connect over SSH; other clients work fine

I have a CentOS system that I can connect to using several SSH clients (FireSSH, WinSCP, MySQL Workbench over SSH). For some reason, PuTTY, which was working a few days ago, can not connect. It will ...
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1answer
127 views

Cannot start NFS in Centos 7

I can't start an NFS server in CentOS7. The packages downloaded: yum -y install nfs-utils yum -y install nfs-utils-lib Enable/start services systemctl enable/start rpcbind systemctl enable/start ...
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1answer
36 views

How do I get X to start without a monitor attached while using NVIDIA drivers?

card : Geforce GT 730 OS : Centos 6.5 I'm trying to demo HP RGS on a CentOS 6.5 machine located in a DC offsite. RGS requires X to be running with NVidia HW acceleration, but I can't get X to start ...
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1answer
37 views

CentOS 5.11: yum installs, but packages remain missing

I'm trying to figure out a very strange problem with yum on a fairly old CentOS 5.11 VPS using DirectAdmin. Executing the following command suggests the telnet package is installed: # yum install ...
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49 views

CentOS 6.6: OpenSSL version

I have a CentOS 6.6 system. When I type into command line openssl version, the system gives me OpenSSL 1.0.1e-fips 11 Feb 2013. When I type yum update openssl, then yum says No Packages marked for ...
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Terminal doesn't calls 'then' a syntax error, command not found [closed]

I am a newbie for linux. I have centOS7. I am running a very simple script from BASH. I execute the chmod command and then run the script file from terminal, I get an error saying that if command not ...
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luks volume disappears after reboot

I created a separate partition on a CentOS install (VirtualBox), and am attempting to encrypt it using cryptsetup and LUKS. I'm using the following commands to get this set up: cryptsetup luksOpen ...
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trouble with glib while installing Midnight Commander on centOS

I am trying to ./configure midnight commander downloaded from http://ftp.midnight-commander.org/mc-4.8.14.tar.bz2 and I get the following: checking for GLIB... no configure: error: glib-2.0 not found ...
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1answer
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Is this a violation? using https service in intranet?

I have CentOS 7 servers in the cloud which is offering HTTPS services. Now this Enterprise cant use our services from cloud, so they wanted a local intranet solution, same like i am running in the ...
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PHP 5.6.10 Bad Installation on CentOS 7 using Plesk 12

I upgraded the PHP version from 5.4 to 5.6.10 with remi and while I am trying to access to a file.php I can see the full code in "Source code". I was reading about that and it seems that the ...
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1answer
27 views

How to copy a installed library to a remote Linux host

I am a newbie on Linux and trying to host my Java project on a remote linux host(CentOS). My Project depends on some native libraries that needs to be existing in the host, and since it is a shared ...
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88 views

Automate slappasswd

I want to automate slappasswd, but the following does not work: [root@controller ~]# echo -e "vagrant\nvagrant\n" | slappasswd New password: while it works to automate passwd: [root@controller ~]# ...