chattr

Change attributes of files or directories. More information: https://manned.org/chattr.

• Make a file or directory [i]mmutable to changes and deletion, even by superuser:

chattr +i {{path/to/file_or_directory}}

• Make a file or directory mutable:

chattr -i {{path/to/file_or_directory}}

• [R]ecursively make an entire directory and contents immutable:

chattr -R +i {{path/to/directory}}

• Mark a directory and its files to be interpreted in a case-insensitive manner:

chattr +F {{path/to/directory}}

• Set a file to only allow [a]ppending:

chattr +a {{path/to/file}}