When you press ctrl+r in the shell, you activate a feature called “reverse-i-search.” Reverse-i-search’ing lets you search through your shell history commands, from most recent to oldest.

• To start searching, press ctrl+r
• Then type the beginning of the command you are looking for
• If the first result isn’t what you want, press ctrl+r again to see the next result
• When you find the command you want, press ENTER to run it