Shell script

Aside from 🤮, I need to write Shell script in several place.

This is a note for me.

test - man test

I searched these difference many times.

file

• -e: exists
• -f: exists & regular # What is the regular? 🤔
• -d: exists & directory
• -r: exists & the user has read permission
• -w: exists & the user has write permission
• -x: exists & executable
• -N: exists & modified from last read
• -s: exists & non empty

string

• -n: non empty
• -z: empty