setup_keys.sh

#!/bin/bash

read -p 'Enter COSC Username: ' user

echo "Writing ~/.ssh.config..."
cat > ~/.ssh/config << END
# This is the most part as it allows access to the gateway computer 
# Accessing any internal computers requires this base configuration.
Host cosc
   Hostname linux.cosc.canterbury.ac.nz
   # Change this to YOUR username
   User $user
   IdentityFile ~/.ssh/cosc_rsa

Host cs*
     ProxyJump cosc
   # Change this to YOUR username
   User $user
   StrictHostKeyChecking=no

# This allows common settings for ALL hosts
Host *
   ServerAliveInterval 240
   StrictHostKeyChecking=no
   ForwardX11 Yes
   IdentityFile ~/.ssh/cosc_rsa
END

chmod 600 ~/.ssh/config

ssh-keygen -o -t rsa -f ~/.ssh/cosc_rsa -q -P ""
ssh-copy-id -i ~/.ssh/cosc_rsa "$user"@linux.cosc.canterbury.ac.nz

scp ~/.ssh/cosc_rsa.* cosc