chflags

Change file or directory flags. More information: https://ss64.com/osx/chflags.html.

Set the hidden flag for a file:

chflags {{hidden}} {{path/to/file}}

Unset the hidden flag for a file:

chflags {{nohidden}} {{path/to/file}}

Recursively set the uchg flag for a directory:

chflags -R {{uchg}} {{path/to/directory}}

Recursively unset the uchg flag for a directory:

chflags -R {{nouchg}} {{path/to/directory}}