I memorized 8 useful grep command option switches that are useful in most cases.

You know that uname -a only prints the Linux kernel version as well as CPU architecture (e.g. 32/64bit), it doesn’t tell you the Linux distribution name and its release number.

It won’t take you more than 3 minutes (perhaps even less than 1 minute) to configure Linux Samba to host a shared folder on Linux system.

It’s not easy and intuitive for most people who use rpm to install or upgrade a RHEL package that has a hell of a lot of dependencies to resolve. The yum, another RPM package manager, is definitely a life-saver for RHEL sysadmin!

Here is an easy shortcut for system administrator who wants to upgrade RHEL 5 on-the-fly without reinstalling the Linux.

Question: How to add leading zero to an integer value in Bash shell script?

Question: Can we execute a Bash shell command or Linux program from within awk script?