LINUX/UNIX

Introduction to UNIX

Compute Canada has put together some introductions to UNIX.

• Basic intro from Compute Canada
• Sharcnet - fairly in-depth
• SciNet - also pretty in-depth

Odds and Ends

This is a collection of useful tools, commands, and random odds and ends.

screen

• A useful terminal manager - especially on remote servers.
  • It allows you to continue to run scripts in interactive sessions on servers, even if you need to disconnect from the server (or get disconnected).
  • Useful for scripts that take a long time, or when you only have a few minutes to spare / want to check in on it later.
• See User Manual
• See also this Blog
• Key commands to remember are:
  • Create a new screen with the name <name>: screen -S <name>
  • Detach from current screen: crtl+a d
  • Re-attach screen: screen -r <name> (can omit <name> if only one session exists)
  • List all currently running screen sessions: screen -ls
  • To end a screen session: exit from within the session

RSA Keys

Tired of typing in your password every time you log in somewhere? Use an RSA Key. It's also more secure.

• Learn more here and here

Misc.

• Source code comparison Mdiff
• MPIRUN in the background
• Limiting MATLAB processor usage
• Combine PNG images into an AVI movie file mkavi.sh
• Cleaning up model output files Keep.sh
• Remote/Virtual desktop with NoMachine NX
• Manual process placement on multi-processor machines

Linux servers owned by the Fluids Lab

• info specific to winisk and kazan (no longer in service)
• info specific to hood.math
• info specific to belize, belize2.math (formerly boogaloo), belize3.math
• info specific to bow, minnewanka, waterton ("mountain lakes")
• simple local file sharing
• Login script (.profile, .cshrc) for the MFCF-administered machines