setfacl

Set file access control lists (ACL). More information: https://manned.org/setfacl.

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 a user:

setfacl -x u:{{username}} {{file}}

Remove all ACL entries of a file:

setfacl -b {{file}}