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}}