mflorida

#!/bin/bash

# file path example
FILE=/home/user/src.dir/prog.c

echo ${FILE#/*/}  # ==> user/src.dir/prog.c -- remove everything BEFORE the SECOND '/'
echo ${FILE##*/}  # ==> prog.c -- remove part BEFORE LAST '/'
echo ${FILE%/*}   # ==> /home/user/src.dir -- remove everything AFTER the LAST '/'
echo ${FILE%%/*}  # ==> nil -- remove everything AFTER the FIRST '/' (returns empty string)
echo ${FILE%.c}   # ==> /home/user/src.dir/prog -- remove everything AFTER '.c'

magnetikonline

Bash string manipulation cheatsheet

Assignment
Assign value to variable if variable is not already set, value is returned. Combine with a : no-op to discard/ignore return value.	${variable="value"} : ${variable="value"}