On 2015-03-16 14:41, Michael Havens wrote:
I wrote something and was wondering if I could shorten it. I wrote:
sudo adduser pi audio 
sudo adduser pi video 
[more]

And was thinking I could shorten it to:
sudo adduser pi{ audio video input dialout plugdev tty}

I don't think brace expansion will do what you want here, though I Could Be Wrong. Try this:

for i in audio video input dialout plugdev tty ; do
  sudo adduser pi $i
  done

...the "for i in A B C ; do ... done" loop in bash is really useful and really easy. Works with any list of space-separated items, so if you want to do something 10 times, "for i in `seq 1 10` ; do ... done" and Bob's your uncle.

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