In this guide let us see how to provide special permission for a user on file or directory by using ACL.
# chmod A+user:jack:read_data/write_data/execute:allow /home/export/sysadmin/
-bash-4.1$ ls -v /home/export/sysadmin/ total 4 -rw-r--r-- 1 jack staff 0 Dec 22 10:32 1111 0:owner@:read_data/write_data/append_data/read_xattr/write_xattr /read_attributes/write_attributes/read_acl/write_acl/write_owner /synchronize:allow 1:group@:read_data/read_xattr/read_attributes/read_acl/synchronize:allow 2:everyone@:read_data/read_xattr/read_attributes/read_acl/synchronize :allow
This is similar to setfacl command in Linux.