Check if a file has an ACL by using the ls command.
$ ls -l filename |
filename |
Specifies the file or directory. |
A plus sign (+) to the right of the mode field indicates the file has an ACL.
Unless you have added ACL entries for additional users or groups on a file, a file is considered to be a "trivial" ACL and the + will not display.
The following example shows that ch1.doc has an ACL, because the listing has. a `+' to the right of the mode field.
$ ls -l ch1.doc -rwxr-----+ 1 nathan sysadmin 167 Nov 11 11:13 ch1.doc |