# `setfacl`

`setfacl` modifies filesystem access control lists for files and directories.

## Common `setfacl` usage

Give a specific user permission to read, write, and execute within a folder:

- modifies ACL
- alternative to `chmod` 

```bash
setfacl -m u:username:rwx myfolder
```

Helpful options.

| Option | Meaning |
| :----- | :------ |
| \-m, \--modify=acl        | modify the current ACL(s) of file(s) |
| \-M, \--modify-file=file  | read ACL entries to modify from file |
| \-x, \--remove=acl        | remove entries from the ACL(s) of file(s) |
| \-b, \--remove-all        | remove all extended ACL entries |
| \-R, \--recursive         | recurse into subdirectories |