Protip

Terminal autocompletion

Tired of going through of your bash history and pressing up arrow key to find that one specific command? Use bash autocompletion

1. Create a file called .inputrc in your home directory (e.g., /uoa/home/r04mr23/.inputrc)
2. Copy and paste the following to the file
   .inputrc

   "\e[A": history-search-backward
   "\e[B": history-search-forward
3. Save it and reload your terminal by creating a new terminal (it's the + button beside the bash)
4. Now whenever you're typing a command you can use up or down arrow key to search for the previous command that you used. Here's the example:

   # I typed `sba`
   [r04mr23@maxlogin1(maxwell) ~]$ sba
   
   # I pressed up arrow
   [r04mr23@maxlogin1(maxwell) ~]$ sbatch /uoa/home/r04mr23/sharedscratch/src/start_jupyter.sh benccchmarker-simulation
   
   # I pressed the up arrow again
   [r04mr23@maxlogin1(maxwell) ~]$ sbatch alignment_slurm.sh 

Passwordless Auth to VS Code Remote

It can be annoying to have to reenter your Maxwell password every time you're trying to connect to it. Here's how you can bypass it:

1. Open terminal on your local pc
2. Generate public and private keys using OpenSSL, change <local_user> with your username (e.g., r04mr23 for me)

   ssh-keygen -q -b 2048 -P "" -f /Users/<local_user>/.ssh/keys/maxlogin_rsa -t rsa
   This will output two files maxlogin1_rsa (private key) and maxlogin1_rsa.pub (publick key)
3. Update your ssh config located on /Users/<localuser>/.ssh/config (create one if you don't have) by adding the following, again change the <local_user> and <remote_user> with yours, usually they're the same for Maxwell

   Host maxlogin1
   HostName maxlogin1.abdn.ac.uk
   User <remote_user>
   Port 22
   PreferredAuthentications publickey
   IdentityFile "/Users/<local_user>/.ssh/keys/maxlogin1_rsa"
4. Copy the content of the maxlogin1_rsa.pub to <remote_user_home_dir>/.ssh/authorized_keys (in Maxwell it's /uoa/home/<remote_user_name>/.ssh/authorized_keys create one if it doesn't exist), your file should look like this now

   ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAACAQCxu/dOSNX1aRYB8Abl1Jbj0zFTwCCQBaXi/ZsWJS4mEX0RkXckItf2hf0O14PBZ8DdW9RS/zdadadasdaystdeyuasgdhjagjhdgashjdghjasdtyaatyuetyquegjhwqghjdaghjsdghsjagdhjagsdhjaghjdgahsjdghjastdyaudtyuatdyuatsyudtasyudtasyudryrqtyertyqwretfqghwefqgwhefghqfhegqfwgheqw m.ramdhani.23@abdn.ac.uk
5. Update the permission to 600 (File can only be accessed by you, inaccessible to everyone else)

   [r04mr23@maxlogin1(maxwell) ~]$ chmod 600 /uoa/home/<remote_user_name>/.ssh/authorized_keys
6. Now you can log in to VS Code without password!