Improving Your Shell Usage (2010 UWCS Intro Talk)

Introduction to using a shell talk given to new UWCS members in 2010. Overhaul of the 2009 version.

Transcript

1. Improving your shell usage by Chris Sinjakli (Sinjo)
2. Why? • Department computers • CS student (Pro Skills module) • Web hosting • IRC
3. Navigation Where am I? The pwd command will show you the current working directory:
4. Navigation Changing directory The cd command will change to the directory specified:
5. Navigation Listing directory contents The ls command lists the contents of current directory:
6. Navigation Other useful commands: • cp <source> <destination> - Copies <source> to <destination> • mv <source> <destination> - Moves <source> to <destination> • mkdir <name> - Creates a directory called <name> • rm <target> - Removes <target> (no “Are you sure?”, be careful)
7. Editing files Nano Quick to get started with, shortcuts at the bottom
8. Editing files Vim More advanced, learn how to quit before opening
9. Editing files Emacs Also advanced, I’ve never actually used it
10. Command History A faster way to retype commands • Previously typed commands are saved • Up/down arrow keys can be used to access them • Not that useful if you want to go far back
11. Command History Searching through History Press Ctrl+r to search your shell history. As you type, it will narrow down hits in your history.
12. Leaving things running • Running programs stop when you exit the shell • Programs can be left running inside the screen application
13. Leaving things running Creating a session You can create a new session by just using the "screen" command.
14. Leaving things running Resuming a session The -r switch is used to reattach a screen session. $ screen -r [your previous session will appear here]
15. Leaving things running Resuming a session If you're already attached to a session from somewhere else, you'll see something like this: $ screen -r There are screens on: 15716.pts-4.viglab-26 (Attached) There is no screen to be resumed.
16. Leaving things running Resuming a session You can remote detach the running session, allowing you to attach it elsewhere. $ screen -d [remote detached] You can combine the two switches 'screen -dr' to remote detach, then reattach here.
17. Persistent IRC connection • Leave irssi (an IRC client) running in screen • No disconnects/reconnects to the server • Chat history • Used by a lot of our members
18. Persistent IRC connection With screen open: 1. Run irssi $ irssi 2. Connect to a server (irc.uwcs.co.uk for ours) /connect <Server Address>
19. Persistent IRC connection Joining a channel /join #compsoc
20. Persistent IRC connection Switching channels • Hotkeys for lower number channels (Alt + 1-0, Alt + q-o) • /win <number> command for anything above that • Alt + a to go to next window with activity
21. Persistent IRC connection Leaving a channel In the channel you wish to leave: /part <Quit Message>
22. Our services • Web hosting • Database • Shell access to member server (Codd)
23. Web hosting • Included in membership • YourName.uwcs.co.uk by default • 1GB of quota (upgradable) • Support for PHP sites (WordPress, Drupal, etc) • Available to societies
24. Web hosting • Basics – YourName.uwcs.co.uk – Files in ~/public_html/ – Just Works (most of the time, some things like Drupal need more config on our side) – Need to request a shell account
25. Web hosting • Your own domain – Register with your preferred registrar – Point DNS records to our server – Nudge techteam to configure our web server • What is your domain name? • Which directory is your site in?
26. Database • MySQL database for each user • Needs requesting separately to shell account • Necessary for WordPress, etc • Also available to societies
27. Questions?
28. Contact • IRC: irc.uwcs.co.uk • Forums: forums.uwcs.co.uk • Email: compsoc-exec@uwcs.co.uk There is a topic on the forums for this talk.