With regex and grep, you can search for patterns in text files with either simple or very complex patterns. Also: The first 5 Linux commands every new user should learn ...

The everlastingly useful grep command can change its character with the flip of a switch to help you find things.

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

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.

These are called "wildcards," and they can make your life in the Linux terminal much easier. Wildcard characters, also known ...

If you really want to see what's happening beneath the hood of your Linux distribution, you need to use log files.

I should hope not. "Unix experience" implies you know how to get stuff done using tools common to most Unix-likes, like sed, grep and awk covered in this article.

Oh, the memories of utilities I haven't used in many years.... Incidentally, you can do a lot of these command-line exercises almost as succinctly with perl one-liners, which is one reason why ...

The grep command is a handy, reliable tool for searching for files or information. This tutorial illustrates 10 ways to take advantage of its power and flexibility.

Combining cat with Other Commands The cat command's versatility shines when combined with other commands through pipes. By piping the output of cat into another command, you can perform complex ...