Linux is a free and open-source operating system available in many distributions. It emphasizes flexibility, control, and customization through its use of plain text files and commands, small focused programs, and open-source code. Shell scripts allow users to combine Linux programs and commands to automate tasks and create their own programs without compiling code.

1. Linux beyond ls and cd HARVARD COMPUTER SOCIETY

2. What is Linux?

4. What is GNU/Linux?

5. GNU’s Not Unix It’s recursive… get it The Free Software Foundation

6. Linux is: Free Software

7. Linux is: $0.00

8. Available in many distributions on many platforms

9. Ultimate flexibility and control

10. Linux is for HAXX0RS!!1

11. Movies with bad hacking

12. the internets is going down

13. lol hacking??

14. Movies with good hacking

15. Trinity uses Linux.

17. Linux General Principles

20. Where is everything? bin/ etc/ lib/ misc/ oracle@ scratch@ tmp/ boot/ home@ local/ mnt/ proc/ shells/ usr/ cdrom@ initrd/ lost+found/ nfs/ root/ srv/ var/ dev/ initrd.img@ media/ opt/ sbin/ sys/ vmlinuz@

22. Your Home Directory ~/

23. The Linux filetree is flexible. / ./ ../ symlinks

24. User configurations Hidden files : /.hiddenstuff

25. Useful programs

28. So how do I do anything useful? PIPE > >> |

29. Getting to know your shell tcsh bash zsh

37. As you can see there are many similarities… BASH is a programming language in and of itself. You put all the little pieces of Linux together in the ways that suit you best. It’s your computer to control.

39. Till next time... http:// hcs .harvard.edu/~ powerpak for a copy of this presentation Come to HCS weekly meetings Wednesdays at 8pm, SOCH 307 Free Pizza courtesy of Google.