Ubuntu server. Please complete the following:

$$ Use a command to find accounts that have no passwords set $($there will likely be none$).$

$$ Use a command to find any world$-$writable files or directories on the server $($there should

also be none$).$

$$ Create a file named secure$.$txt in root$$s home directory, enter the line Secure Server, then

encrypt the file with a GPG key. Use Passw$0$rd for the passphrase. Be sure to remove the

unencrypted version of the file.

$$ Disable password caching for the GPG agent in the user$$s home directory.

$$ Disable root login for SSH$.$