Bash comparison options Cheat Sheet by respi

-c file

True if file is a Char­acter special device

-e file

True if file Exists

-G file

True if file is owned by the current effective group id

-L file

True if file is a symbolic Link

-p file

True if file is a named Pipe

-S file

True if file is a Socket

-t [FD]

True if FD is opened on a termin­al. If FD is omitted, it defaults to 1 (standard output)

-w file

True if file is writ­able

file1 -ef file2

True if file1 and file2 have the same device and inode numbers, i.e., if they are hard links to each other

file1 -ot file2

True if file1 is older than file2

-n String

True if the length of String is nonzero

String1 != String2

True if the strings are not equal

ARG1 -ne ARG2

True if ARG1 is not-equal ARG2

ARG1 -le ARG2

True if ARG1 is less-t­han­-or­-equal ARG2

ARG1 -ge ARG2

True if ARG1 is greate­r-t­han­-or­-equal ARG2