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 --modify u:username:rw path/to/file_or_directory

• Modify default ACL of a file for all users:

setfacl --modify --default u::rw path/to/file_or_directory

• Remove ACL of a file for a user:

setfacl --remove u:username path/to/file_or_directory

• Remove all ACL entries of a file:

setfacl --remove-all path/to/file_or_directory