How to execute one command in multiples directories using "GNU parallel"?

Question

Every day I have to update a bunch of repositories and also execute in some of them another command (from CARTON, Perl module dependency manager). I use always a loop to do that but I want do it parallely with GNU parallel if it is possible but I don't understand so well its tutorial.

The point more similar I've read that can help me is called "Running the same commands on all hosts" so I got into the directory with all repos and I tried to execute: parallel --onall carton but I don't know if it works or not. Anyone can help me?

To update repositories: for REPO in `ls`; do ( cd "$REPO"; git pull) ; done; To update dependencies: for REPO in `ls`; do ( cd "$REPO"; carton) ; done; — Noob_Number_1, Oct 15 '14 at 13:26

score 7 · Accepted Answer · answered Oct 15 '14 at 20:37

7

parallel 'cd {} && git pull' ::: *
parallel 'cd {} && carbon' ::: *

answered Oct 15 '14 at 20:37

Ole Tange

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Thanks, it worked fine. Also, thanks to this [document](http://wiki.scinethpc.ca/wiki/images/7/7b/Tech-talk-gnu-parallel.pdf) I could understood better the syntax. – Noob_Number_1 Oct 16 '14 at 08:34

How to execute one command in multiples directories using "GNU parallel"?

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