# setfacl > Set file access control lists (ACL). > More information: . - [M]odify ACL of a file for user with read and write access: `setfacl --modify u:{{username}}:rw {{path/to/file_or_directory}}` - [M]odify [d]efault 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}}`