Encountering unset variables is common when scripting. Often your script needs to ask questions about values before using ...

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

Diplomats told E.U. officials that the bloc’s law on methane, a potent greenhouse gas, would hurt American oil and gas companies. By Lisa Friedman A yearly checkup on the region documents a warmer, ...

Cron persistence is a common Linux malware technique. Learn how it works, how to detect it, and how to remove malicious cron ...