# setfacl > Set file access control lists (ACL). - Modify ACL of a file for user with read and write access: `setfacl -m u:{{username}}:rw {{file}}` - Modify default ACL of a file for all users: `setfacl -d -m u::rw {{file}}` - Remove ACL of a file for an user: `setfacl -x u:{{username}} {{file}}` - Remove all ACL entries of a file: `setfacl -b {{file}}`