The grep command can search for and list Linux files based on strings you are looking for and add the context of surrounding text.

The eval command allows you to run the contents of variables as commands and can be very useful -- especially in scripts.

How to find files in Linux with grep: 10 examples (free PDF) The grep command is a handy, reliable tool for searching for files or information.

Linux/BSD command line wizardry: Learn to think in sed, awk, and grep "Do people really write these long, convoluted commands?" In a word: yes.

After a while you start both putting commands into scripts and typing one-off multi-line small programs just on the command line.

After jumping into the Ubuntu command line yesterday, today I decided to dive a little deeper and explore the 'man' and 'grep' commands more closely.