Checking Before You Act: File Tests

File tests let a script look before it acts: -e asks whether a path exists, -f and -d whether it's a file or a folder, -s whether a file has anything in it, and -nt whether it's newer than another.

Updated

Cheat sheet for the lesson Checking Before You Act: File Tests: File tests let a script look before it acts: -e asks whether a path exists, -f and -d whether it's a file or a folder, -s whether a file has anything in it, and -nt whether it's newer than another.
Category
Bash
Level
Apprentice
Tags
Directory, file-test, linux, modification-time, test-command, unix