$ getfacl --help Usage: getfacl [-adn] FILE [FILE2...] Display file and directory access control lists (ACLs). -a, --all display the filename, the owner, the group, and the ACL of the file -d, --dir display the filename, the owner, the group, and the default ACL of the directory, if it exists -h, --help output usage information and exit -n, --noname display user and group IDs instead of names -v, --version output version information and exit When multiple files are specified on the command line, a blank line separates the ACLs for each file. For each argument that is a regular file, special file or directory, getfacl displays the owner, the group, and the ACL. For directories getfacl displays additionally the default ACL. With no options specified, getfacl displays the filename, the owner, the group, and both the ACL and the default ACL, if it exists. The format for ACL output is as follows: # file: filename # owner: name or uid # group: name or uid user::perm user:name or uid:perm group::perm group:name or gid:perm mask:perm other:perm default:user::perm default:user:name or uid:perm default:group::perm default:group:name or gid:perm default:mask:perm default:other:perm $ setfacl --help Usage: setfacl [-r] (-f ACL_FILE | -s acl_entries) FILE... setfacl [-r] ([-d acl_entries] [-m acl_entries]) FILE... Modify file and directory access control lists (ACLs) -d, --delete delete one or more specified ACL entries -f, --file set ACL entries for FILE to ACL entries read from a ACL_FILE -m, --modify modify one or more specified ACL entries -r, --replace replace mask entry with maximum permissions needed for the file group class -s, --substitute substitute specified ACL entries for the ACL of FILE -h, --help output usage information and exit -v, --version output version information and exit At least one of (-d, -f, -m, -s) must be specified Acl_entries are one or more comma-separated ACL entries from the following list: u[ser]::perm u[ser]:uid:perm g[roup]::perm g[roup]:gid:perm m[ask]:perm o[ther]:perm Default entries are like the above with the additional default identifier. For example: d[efault]:u[ser]:uid:perm 'perm' is either a 3-char permissions string in the form "rwx" with the character - for no permission or it is the octal representation of the permissions, a value from 0 (equivalent to "---") to 7 ("rwx"). 'uid' is a user name or a numerical uid. 'gid' is a group name or a numerical gid. For each file given as parameter, setfacl will either replace its complete ACL (-s, -f), or it will add, modify, or delete ACL entries. The following options are supported: -d Delete one or more specified entries from the file's ACL. The owner, group and others entries must not be deleted. Acl_entries to be deleted should be specified without permissions, as in the following list: u[ser]:uid g[roup]:gid d[efault]:u[ser]:uid d[efault]:g[roup]:gid d[efault]:m[ask]: d[efault]:o[ther]: -f Take the Acl_entries from ACL_FILE one per line. Whitespace characters are ignored, and the character "#" may be used to start a comment. The special filename "-" indicates reading from stdin. Required entries are - One user entry for the owner of the file. - One group entry for the group of the file. - One other entry. If additional user and group entries are given: - A mask entry for the file group class of the file. - No duplicate user or group entries with the same uid/gid. If it is a directory: - One default user entry for the owner of the file. - One default group entry for the group of the file. - One default mask entry for the file group class. - One default other entry. -m Add or modify one or more specified ACL entries. Acl_entries is a comma-separated list of entries from the same list as above. -r Causes the permissions specified in the mask entry to be ignored and replaced by the maximum permissions needed for the file group class. -s Like -f, but substitute the file's ACL with Acl_entries specified in a comma-separated list on the command line. While the -d and -m options may be used in the same command, the -f and -s options may be used only exclusively. Directories may contain default ACL entries. Files created in a directory that contains default ACL entries will have permissions according to the combination of the current umask, the explicit permissions requested and the default ACL entries Note: Under Cygwin, the default ACL entries are not taken into account currently.