rhel 6 – nixCraft

HowTo: Prevent Yum From Upgrading The Kernel On a CentOS / Red Hat Enterprise Linux

February 19, 2014February 19, 2014in CentOS, Package Management, RedHat and Friends last updated February 19, 2014

I am a new RHEL / Centos Linux server admin. I would like yum to update all packages except the Linux Kernel. How can I prevent yum command from updating kernel on a CentOS/RHEL/Fedora Linux based systems?

Change Password Using passwd Command Over SSH Based Session

October 4, 2013October 15, 2013in Commands, Linux, Openbsd, UNIX last updated October 15, 2013

I‘m a new Ubutnu Linux user. I backup files to our corporate Unix backup server using the rsync command. The server only allow to upload/download files. I am unable to login to the server. How do change my password using the passwd command over ssh based session?

CentOS / RHEL 6: Install Suhosin PHP Advanced Protection System

November 26, 2012November 18, 2015in Apache, CentOS, Linux, PHP, RedHat and Friends last updated November 18, 2015

Suhosin is an open source patch for PHP. How do I install suhosin under CentOS / Red Hat Enterprise Linux server running on my IBM server?

yum Command: List The Contents (Files) Of A Package

November 17, 2012November 17, 2012in RedHat and Friends last updated November 17, 2012

The rpm -qi command list the files of a package. How do I use yum command to list the contents of a package under CentOS or RHEL installed on IBM server hardware?

HowTo: Listen Pandora In Europe ( Outside USA )

November 17, 2012November 20, 2012in Squid last updated November 20, 2012

I have Pandora Internet Radio One subscription, and recently I moved to Europe for a few months as part of my work schedule. The service fully available only in the United States. How do I access Pandora one service in Europe? Can I get around it by using a proxy server installed on my own server located in USA at home or ISP data center?

CentOS / RHEL: Disable or Enable SELinux Policy Modules

May 6, 2012May 6, 2012in RedHat and Friends last updated May 6, 2012

How do I disable or enable SELinux policy modules under Red Hat Enterprise Linux running on Dell hardware?

CentOS / RHEL: Change / Copy File SELinux Security Context Command

December 28, 2011December 28, 2011in CentOS, RedHat and Friends last updated December 28, 2011

I‘ve created a file as follows:

ls -l -Z /etc/cron.d/vnstat
-rw-r–r–. root root system_u:object_r:system_cron_spool_t:s0 /etc/cron.d/vnstat

I’ve created a new file /etc/cron.d/vnstat.custom.interface:

ls -l -Z /etc/cron.d/vnstat.custom.interface
-rw-r–r–. root root unconfined_u:object_r:system_cron_spool_t:s0 /etc/cron.d/vnstat.custom.interface

The /etc/cron.d/vnstat is part of default vnstat package. I’ve installed my own version of the same. But, due to SELinux security cron job is not running. How do I change file SELinux security contex under RHEL / CentOS 6 Linux server to system_u:object_r:system_cron_spool_t:s0 from unconfined_u:object_r:system_cron_spool_t:s0 for /etc/cron.d/vnstat.custom.interface file?