change up n directories

up () { if [ "${1/[^0-9]/}" == "$1" ]; then p=./; for i in $(seq 1 $1); do p=${p}../; done; cd $p; else echo 'usage: up N'; fi }
Change n directories up, without parameters change one up
Sample Output
/home/someone/directory$ up
/home/someone$ up 2
/$ cd -

2012-04-19 08:16:34

2 Alternatives + Submit Alt

What Others Think

I like your numeric test, but I can still save you a few characters... If you reverse the shell replace, it becomes shorter: if [ -z "$1//[0-9]/" ]; then Next, you need to initialise p, but empty is fine p=; My final suggestion makes the command longer :-0, but it avoids using seq (making it faster) for ((i=0;i<${1:-1};i++)); do That leaves: up() { if [ -z "${1//[0-9]/}" ]; then p=; for ((i=0;i<${1:-1};i++)); do p=${p}../; done; cd $p; else echo 'usage: up N'; fi }
flatcap · 531 weeks and 2 days ago
Nice modified, flatcap! I like your shorter numeric test and the default $1 value (1) in the for-loop. But I think it's better to keep p=./; rather p=; Because it will cd to $HOME, if you type "$ up 0". I think keep "$ up 0" in current directory is better. (maybe)
goldie · 531 weeks and 2 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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