Set file access control lists

setfacl -m u:john:r-- myfile
The file myfile is owned by tom and has read and write permissions for tom. Group and other permissions are empty which make myfile readable and writable only by tom. setfacl enables user tom to give read permission to user john only. The command 'ls -l' shows a '+' sign telling us that file access control list has been setup for myfile.
Sample Output
$ ls -l myfile
-rw------- 1 tom tom 248060 2009-02-15 14:02 myfile
$ getfacl myfile
# file: myfile
# owner: tom
# group: tom
user::rw-
group::---
other::---
$ setfacl -m u:john:r-- myfile
$ getfacl myfile
# file: myfile
# owner: tom
# group: tom
user::rw-
user:john:r--
group::---
mask::r-x
other::---
$ ls -l myfile
-rw-------+ 1 tom tom 248060 2009-02-15 14:02 myfile

3
2009-02-21 21:05:45

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?

You must be signed in to comment.

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands



Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: