Practice this fail.
ERROR has several spellings.
Linux · Restart as often as you like
Read the error, choose a command, and learn
why it works. Nothing runs on your machine.
Using GNU grep, print lines in app.log containing error in any letter case.
ERROR has several spellings.
$ grep error app.log
It missed ERROR and Error.
How do you ignore case while searching for error?
Fixed. By hand.
grep -i -- error app.loggrep -i enables case-insensitive matching. It lets this plain ASCII error pattern match error, Error, and ERROR.
Practice does not affect your daily score or streak.