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CentOS minimal template’s issue with crontab

On my CentOS 5.x 64bit XEN PV template (XEN PV is a virtualization type, this means I am talking about a VPS) doing ‘crontab -e’ gave me the following error [root@vpsadmin ~]# crontab -e no crontab for...

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How to disable SELinux

SELINUX is a security feature on CentOS but some software such as SolusVM will require that SELINUX be disabled Installation log : /tmp/install.log Add this slave to your SolusVM master using the...

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How to change time and/or timezone in CentOS

Generically, I use this Change directory to /etc [root@testbed ~]# cd /etc Now create a symbolic link (aka symlink) to the timezone e.g. Asia/Karachi (for Pakistan standard time) [root@testbed etc]# ln...

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How to fix ‘Crontabs not running’ problem

I have a VPS that I am using for a cPanel DNS-only setup and I was wondering why crontab was not running on this particular VPS. In my particular case, logwatch (a package on CentOS) was not sending me...

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How to configure repos to not overwrite base packages?

The greatest fear with adding additional and especially third party repos such as EPEL (we did a blog post on how to install EPEL earlier) is that it MAY overwrite base packages and bring the system to...

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package-cleanup: command not found

I tried to do package-cleanup and found this root@ns1 [~]# package-cleanup --problems -bash: package-cleanup: command not found If I was on Ubuntu, I would have done “apt-get install package-cleanup”...

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How to find specific files and send alerts

Maintaining a shared hosting server is a full time job but tools and proper checks and balances can help make this burden lot less. I manage a shared hosting server for one of my friends and numerous...

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Error: Could not stat() command file ‘/var/lib/nagios3/rw/nagios.cmd’!

Error: Could not stat() command file ‘/var/lib/nagios3/rw/nagios.cmd’! The external command file may be missing, Nagios may not be running, and/or Nagios may not be checking external commands. An...

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Play all media formats on Ubuntu 14.04 LTS Desktop

I still remember the first time I test-drove Mandriva Linux (formerly known as Mandrake), I could run every other audio and video format out-of-the-box without downloading anything (it was a dialup...

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How to install dig in Ubuntu

dig is a very useful utility to help webmaster and server admins alike. To install dig, just run the following in Ubuntu sudo apt-get install dnsutils

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