Useful bash commands

usefulbash.sh

# sort folders/files by disk usage
du -hc . | grep [.]/[^/]*$ | sort -h

# replace in all files
grep -rl matchstring somedir/ | xargs sed -i 's/string1/string2/g'

# script to rename in all files:
#!/usr/bin/env bash
if [ $# -ne 3 ]; then
	exit
fi
find $1 -type f -print0 | xargs -0 sed -i "s/$2/$3/g"