This requires netcat to be installed locally and on the server. Install it with
brew install netcat on macOS with Homebrew.
The script below will copy the scripts/listen-server-ports.sh script to the
student's server and run it. That script runs a netcat process on each of the 4
ports that are supposed to be open. Those processes echo OK once as soon as a
client connects.
Local netcat commands are then run to connect to each port and verify that the
OK is received. This shows that the firewall was correctly configured to open
these ports.
The listen-server-ports.sh script is then killed and deleted from the server.
The contents of all /home/*/.ssh directories is listed to check that the
student has correctly created their own user, and that all SSH directory/file
permissions are correct for the ubuntu user and the student's user.
The hostname and the contents of the /etc/hostname files are also displayed
for validation.
$> ./scripts/check-student-server.sh 1.2.3.4 admin_userNote: each
nccommand must be stopped by typingCtrl-Conce after theOKreceived from the server is displayed.