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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) Terminal overview
  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!

Automatically load slurm on every log in​

Are you annoyed by the bash: sbatch: command not found error message every time you want to submit a job because you forget to do module load slurm? Adding it to your ~/.bashrc file will automatically load slurm

[r04mr23@maxlogin1(maxwell) ~]$ vim ~/.bashrc

# Press `shift + g + $` to go to the end of the line, press `i` then `enter` and type `module load slurm`