Pretty comprehensive ACL tests. This must be run on a filesystem with ACL support. Also, you will need two dummy users (bin and daemon) and a dummy group (daemon). $ rm -f f $ umask 027 $ touch f Only change a base ACL: $ setfacl -m u::r f $ setfacl -m u::rw,u:bin:rw f $ ls -dl f | awk '{print $1}' > -rw-rw----+ $ getfacl --omit-header f > user::rw- > user:bin:rw- > group::r-- > mask::rw- > other::--- > $ rm f $ umask 022 $ touch f $ setfacl -m u:bin:rw f $ ls -dl f | awk '{print $1}' > -rw-rw-r--+ $ getfacl --omit-header f > user::rw- > user:bin:rw- > group::r-- > mask::rw- > other::r-- > $rm f $ umask 027 $ mkdir d $ setfacl -m u:bin:rwx d $ ls -dl d | awk '{print $1}' > drwxrwx---+ $ getfacl --omit-header d > user::rwx > user:bin:rwx > group::r-x > mask::rwx > other::--- > $ rmdir d $ umask 022 $ mkdir d $ setfacl -m u:bin:rwx d $ ls -dl d | awk '{print $1}' > drwxrwxr-x+ $ getfacl --omit-header d > user::rwx > user:bin:rwx > group::r-x > mask::rwx > other::r-x > $ rmdir d Multiple users $ umask 022 $ touch f $ setfacl -m u:bin:rw,u:daemon:r f $ ls -dl f | awk '{print $1}' > -rw-rw-r--+ $ getfacl --omit-header f > user::rw- > user:bin:rw- > user:daemon:r-- > group::r-- > mask::rw- > other::r-- > Multiple groups $ setfacl -m g:users:rw,g:daemon:r f $ ls -dl f | awk '{print $1}' > -rw-rw-r--+ $ getfacl --omit-header f > user::rw- > user:bin:rw- > user:daemon:r-- > group::r-- > group:daemon:r-- > group:users:rw- > mask::rw- > other::r-- > Remove one group $ setfacl -x g:users f $ ls -dl f | awk '{print $1}' > -rw-rw-r--+ $ getfacl --omit-header f > user::rw- > user:bin:rw- > user:daemon:r-- > group::r-- > group:daemon:r-- > mask::rw- > other::r-- > Remove one user $ setfacl -x u:daemon f $ ls -dl f | awk '{print $1}' > -rw-rw-r--+ $ getfacl --omit-header f > user::rw- > user:bin:rw- > group::r-- > group:daemon:r-- > mask::rw- > other::r-- > $ rm f Default ACL $ umask 027 $ mkdir d $ setfacl -m u:bin:rwx,u:daemon:rw,d:u:bin:rwx,d:m:rx d $ ls -dl d | awk '{print $1}' > drwxrwx---+ $ getfacl --omit-header d > user::rwx > user:bin:rwx > user:daemon:rw- > group::r-x > mask::rwx > other::--- > default:user::rwx > default:user:bin:rwx #effective:r-x > default:group::r-x > default:mask::r-x > default:other::--- > Umask now ignored? $ umask 027 $ touch d/f $ ls -dl d/f | awk '{print $1}' > -rw-r-----+ $ getfacl --omit-header d/f > user::rw- > user:bin:rwx #effective:r-- > group::r-x #effective:r-- > mask::r-- > other::--- > $ rm d/f $ umask 022 $ touch d/f $ ls -dl d/f | awk '{print $1}' > -rw-r-----+ $ getfacl --omit-header d/f > user::rw- > user:bin:rwx #effective:r-- > group::r-x #effective:r-- > mask::r-- > other::--- > $ rm d/f Default ACL copying $ umask 000 $ mkdir d/d $ ls -dl d/d | awk '{print $1}' > drwxr-x---+ $ getfacl --omit-header d/d > user::rwx > user:bin:rwx #effective:r-x > group::r-x > mask::r-x > other::--- > default:user::rwx > default:user:bin:rwx #effective:r-x > default:group::r-x > default:mask::r-x > default:other::--- > $ rmdir d/d $ umask 022 $ mkdir d/d $ ls -dl d/d | awk '{print $1}' > drwxr-x---+ $ getfacl --omit-header d/d > user::rwx > user:bin:rwx #effective:r-x > group::r-x > mask::r-x > other::--- > default:user::rwx > default:user:bin:rwx #effective:r-x > default:group::r-x > default:mask::r-x > default:other::--- > Add some users and groups $ setfacl -nm u:daemon:rx,d:u:daemon:rx,g:users:rx,g:daemon:rwx d/d $ ls -dl d/d | awk '{print $1}' > drwxr-x---+ $ getfacl --omit-header d/d > user::rwx > user:bin:rwx #effective:r-x > user:daemon:r-x > group::r-x > group:daemon:rwx #effective:r-x > group:users:r-x > mask::r-x > other::--- > default:user::rwx > default:user:bin:rwx #effective:r-x > default:user:daemon:r-x > default:group::r-x > default:mask::r-x > default:other::--- > Symlink in directory with default ACL? $ ln -s d d/l $ ls -dl d/l | awk '{print $1}' > lrwxrwxrwx $ ls -dl -L d/l | awk '{print $1}' > drwxr-x---+ $ getfacl --omit-header d/l > user::rwx > user:bin:rwx #effective:r-x > user:daemon:r-x > group::r-x > group:daemon:rwx #effective:r-x > group:users:r-x > mask::r-x > other::--- > default:user::rwx > default:user:bin:rwx #effective:r-x > default:user:daemon:r-x > default:group::r-x > default:mask::r-x > default:other::--- > $ rm d/l Does mask manipulation work? $ setfacl -m g:daemon:rx,u:bin:rx d/d $ ls -dl d/d | awk '{print $1}' > drwxr-x---+ $ getfacl --omit-header d/d > user::rwx > user:bin:r-x > user:daemon:r-x > group::r-x > group:daemon:r-x > group:users:r-x > mask::r-x > other::--- > default:user::rwx > default:user:bin:rwx #effective:r-x > default:user:daemon:r-x > default:group::r-x > default:mask::r-x > default:other::--- > $ setfacl -m d:u:bin:rwx d/d $ ls -dl d/d | awk '{print $1}' > drwxr-x---+ $ getfacl --omit-header d/d > user::rwx > user:bin:r-x > user:daemon:r-x > group::r-x > group:daemon:r-x > group:users:r-x > mask::r-x > other::--- > default:user::rwx > default:user:bin:rwx > default:user:daemon:r-x > default:group::r-x > default:mask::rwx > default:other::--- > $ rmdir d/d Remove the default ACL $ setfacl -k d $ ls -dl d | awk '{print $1}' > drwxrwx---+ $ getfacl --omit-header d > user::rwx > user:bin:rwx > user:daemon:rw- > group::r-x > mask::rwx > other::--- > Reset to base entries $ setfacl -b d $ ls -dl d | awk '{print $1}' > drwxr-x--- $ getfacl --omit-header d > user::rwx > group::r-x > other::--- > Now, chmod should change the group_obj entry $ chmod 775 d $ ls -dl d | awk '{print $1}' > drwxrwxr-x $ getfacl --omit-header d > user::rwx > group::rwx > other::r-x > $ rmdir d $ umask 002 $ mkdir d $ setfacl -m u:daemon:rwx,u:bin:rx,d:u:daemon:rwx,d:u:bin:rx d $ ls -dl d | awk '{print $1}' > drwxrwxr-x+ $ getfacl --omit-header d > user::rwx > user:bin:r-x > user:daemon:rwx > group::rwx > mask::rwx > other::r-x > default:user::rwx > default:user:bin:r-x > default:user:daemon:rwx > default:group::rwx > default:mask::rwx > default:other::r-x > $ chmod 750 d $ ls -dl d | awk '{print $1}' > drwxr-x---+ $ getfacl --omit-header d > user::rwx > user:bin:r-x > user:daemon:rwx #effective:r-x > group::rwx #effective:r-x > mask::r-x > other::--- > default:user::rwx > default:user:bin:r-x > default:user:daemon:rwx > default:group::rwx > default:mask::rwx > default:other::r-x > $ chmod 750 d $ ls -dl d | awk '{print $1}' > drwxr-x---+ $ getfacl --omit-header d > user::rwx > user:bin:r-x > user:daemon:rwx #effective:r-x > group::rwx #effective:r-x > mask::r-x > other::--- > default:user::rwx > default:user:bin:r-x > default:user:daemon:rwx > default:group::rwx > default:mask::rwx > default:other::r-x > $ rmdir d Dangling symlink test http://savannah.nongnu.org/bugs/?28131 $ mkdir d $ ln -s d/a d/b $ getfacl -R d > # file: d > # owner: %TUSER > # group: %TGROUP > user::rwx > group::rwx > other::r-x > $ setfacl -R -m u:bin:rw d $ getfacl -RL d > getfacl: d/b: No such file or directory > # file: d > # owner: %TUSER > # group: %TGROUP > user::rwx > user:bin:rw- > group::rwx > mask::rwx > other::r-x > $ setfacl -RL -m u:bin:rw d > setfacl: d/b: No such file or directory $ rm -R d Malformed restore file $ echo "# owner: root" > f $ setfacl --restore=f 2>&1 >setfacl: f: No filename found in line 0, aborting