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How can you run the following pseudo-command?

sudo chown :twin::rwx /usr/local/copyrightLinux

I want that each user in the group twin can read, write and execute all files which belong to the group twin. The apparent problem is with permissions.

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up vote 1 down vote accepted
sudo chown :twin /usr/local/copyrightLinux

sudo chmod g=rwx /usr/local/copyrightLinux
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Note, could also use "sudo chgrp twin /usr/local/copyrightLinux" for the first command. Seems like it might be a bit easier to understand rather than wondering why there's a floating colon in the middle of chown. – Adrian Petrescu Dec 22 '09 at 3:22

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