Quick: If you shout "regular expressions" in a crowd of Linux users, what happens? Answer: Everyone will tell you the right way to use them, and every answer will be different. Regular expressions -- ...

The everlastingly useful grep command can change its character with the flip of a switch to help you find things. The grep command – likely one of the first ten commands that every Unix user comes to ...

With -w, grep will match “error” but skip things like “errors” or “terror.” The difference can be subtle, but when you’re ...

The simplest grep command looks like the one shown below. This “find string in file” command will show all the lines in the file that contain the string, even when that string is only part of a longer ...

You may find yourself in a situation where you remember the content of a file but not its name. Linux offers various commands to help you find files based on specific text strings within them. By ...