Install the acl package:

# yum install acl

Edit /etc/fstab and change the entries for the file systems with which you want to use ACLs so that they include the appropriate option that supports ACLs, for example:

LABEL=/work      /work       ext4     acl     0 0

For mounted Samba shares, use the cifsacl option instead of acl.

Remount the file systems, for example:

# mount -o remount /work