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CW Holeman II
Asked: 2010-02-07 08:49:02 +0800 CST

setfacl: x.txt: Operation not supported

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What I did and what it did:

> getfacl  x.txt 
# file: x.txt
# owner: cwhii
# group: cwhii
user::rw-
group::r--
other::r--

> groups
cwhii adm dialout cdrom plugdev lpadmin admin sambashare
> setfacl --modify=g:adm:rw x.txt
setfacl: x.txt: Operation not supported
> uname -a
Linux road 2.6.31-19-generic #56-Ubuntu SMP Thu Jan 28 01:26:53 UTC 2010 i686 GNU/Linux

What I expected was an additional access control entry on x.txt without an error message.

linux access-control-list

1 Answers

  1. Best Answer

    This sounds like the default mount behavior is not allowing ACLs on the filesystem. getfacl will report the normal filesystem permissions without error, but setfacl is unable to operate because the filesystem is mounted without the ACL option.

    You can add this in /etc/fstab or by modifying your filesystem options.

    Assuming you have the /home filesystem on /dev/sda, you can do the following:

    Modify Filesystem method:

    sudo /sbin/tune2fs -o +acl /dev/sda

    Modify /etc/fstab method:

    /dev/sda /home ext3 defaults,acl 1 2

    Using either method, the filesystem has to be remounted to take effect. You can accomplish this by rebooting, or by running

    sudo /bin/mount -o remount /home

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