Install and enable acl in Ubuntu

sudo apt-get install acl



vi /etc/fstab


put a comma after errors=remount -ro
and then write acl


save the file


if acl is enabled


you should see


acl after a comma after errors=remount - ro


then mount and remount the filesystem which needs acl to be turned on


in my case


mount -o remount /


now create a file and use the command setfacl or getfacl