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How to Insert Text At Certain Line in Linux

Sometimes you may need to insert text at certain line in Linux. Here is how to do it using ed, sed, awk, commands.

Sometimes you may need to remove Ubuntu from dual boot menu. Here is how to uninstall Ubuntu from dual boot.

Sometimes you may have zombie processes in Linux systems. Here is how to find & kill zombie processes in Linux.

Sometimes you may need to create recovery disk for Ubuntu. Here is how to create startup disk for Ubuntu.

Sudo users can run commands as root in Linux. Here is how to add user to sudoers in Linux.

Many times you may need to get free RAM or check RAM size in Linux. Here is how to measure RAM size in Linux.

MySQl Row Number is a very useful window function in MySQL. Here is MySQL Row Number Function & its applications.

Sometimes you may need to turn off firewalld. Here is how to disable/stop firewalld in CentOS, Redhat Linux.

firewalld is a dynamic firewall manager for Linux. Here is how to configure firewalld in Redhat, CentOS Linux.