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

These days, you can’t throw a USB stick without hitting something that’s running Linux. It might be a phone, an embedded device, or your TV. Either way, it’s running Linux, and somewhere along the ...

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 ...

10 ways to use grep to search files in Linux Your email has been sent The grep command is a powerful tool for searching for files or information. Learn some strategies for using it effectively.

Sudo lets you run any terminal command as another user — hence "substitute user" — but the default and most common use for it ...

Whenever you use a simple grep command to find a single word or phrase in a file, you run the risk of getting a lot of extra “stuff” you didn’t want to see. Grep for “not” and you get “nothing”, ...

As a relatively isolated junior sysadmin, I remember seeing answers on Experts Exchange and later Stack Exchange that baffled me. Authors and commenters might chain 10 commands together with pipes and ...

Have a grep question. I know I can grep a text file with -c and get how many times a particular string of text exists. But how can you take an existing text file like this: ...