Bash function for 'cd'ing up the directory tree

up.sh

#
# Bash function for 'cd'ing up the directory tree
#
# Example use:
#     Move working directory up 5 levels
#     $> up 5
#     Equivalent to
#     $> cd ../../../../../
#

function up {
	 
	local counter=${1:-1}
	local dirup="../"
	local out=""

	while (( counter > 0 )); do
		let counter--
		out="${out}$dirup"
	done

	cd $out
}