Update cheatsheets

linux/setfacl

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# setfacl
+
+> Set file access control lists (ACL).
+> More information: <https://manned.org/setfacl>.
+
+- [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}}`