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Lecture 2: Get Started ( ch 2)

Lecture 2: Get Started ( ch 2). IT244 - Introduction to Linux / Unix Instructor: Bo Sheng. Outline . Login to server Working with the shell. Login to Server. Server (hostname): it244a.cs.umb.edu it244b.cs.umb.edu SSH (Secure Shell, no more telnet )

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Lecture 2: Get Started ( ch 2)

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  1. Lecture 2: Get Started (ch 2) IT244 - Introduction to Linux / Unix Instructor: Bo Sheng

  2. Outline • Login to server • Working with the shell

  3. Login to Server • Server (hostname): • it244a.cs.umb.edu • it244b.cs.umb.edu • SSH (Secure Shell, no more telnet) • Use terminal (Linux/Mac OS clients) • Use other software tool (Windows client)

  4. Login to Server • Server (hostname): • it244a.cs.umb.edu • it244b.cs.umb.edu • SSH (Secure Shell) • Use terminal (Linux/Mac OS clients) • Use other software tool (Windows client) • PuTTY • Instructions on course web page http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

  5. Login to Server • If you haven’t got an account • http://www.cs.umb.edu/sp/resources/other/faqs/#FAQ02 • If you haven’t register you account with this class

  6. Login to Server • If you haven’t register you account with this class

  7. Login to Server • If you haven’t register you account with this class

  8. Login to Server (Windows) • PuTTY

  9. Login to Server (Windows) • PuTTY

  10. Login to Server • SSH (Secure Shell) • Use a terminal (Linux/Mac OS clients)

  11. Login to Server • Open a terminal in Ubuntu

  12. Login to Server • SSH (Secure Shell) • Use terminal (Linux/Mac OS clients) • sshusername@hostname • ssh –l username hostname e.g., • ssh shengbo@it244a.cs.umb.edu • ssh –l shengbo it244a.cs.umb.edu

  13. Login to Server (Linux / Mac) • Terminal

  14. Login to Server (Linux / Mac) • Terminal

  15. Outline • Login to server • Working with the shell • Basic file operations • Editing command lines • System info/settings • Help and documents • Everything is case sensitive

  16. Basic File Operations • List files ( ls ) • ls • pwd(print working directory) • ls / • ls /home (see your username?) • ls /home/shengbo/it244

  17. Basic File Operations • Change directory ( cd ) • cd / • ls • pwd • cd /home/your username/it244 • ls • pwd

  18. Basic File Operations • Read files ( cat ) • cat /home/shengbo/it244/welcome • cat /etc/motd • Some files are not readable (e.g., binary) • cat /bin/cat

  19. Basic File Operations • Write/create files ( echo ) • ls • echo “hello world” > hello • ls • cat hello • echo “I am your name” >> hello • cat hello • cat hello hello

  20. Basic File Operations • Execute files • /home/shengbo/it244/exetest • Abort execution • CTRL+C • CTRL+Z and kill • /home/shengbo/it244/exetest • CTRL+Z • jobs • kill %1 • jobs

  21. Editing Command Lines • Delete a char • “backspace” and “delete” • Delete a word ( CTRL+W ) • Delete a line ( CTRL+U ) • Arrow keys • Up / down: browse the command history • Left / right: move the cursor

  22. System info/settings • Which shell we are using? • ps • What OS is running? • uname • Change your passwd • passwd • Something you can’t do (su/sudo) • Try to create a file under /

  23. Help and Documents • --help option • System manuals ( man) • man ls • man cat • man ssh • man man

  24. Help and Documents • --help option • System manuals ( man) • man ls • man cat • man ssh • man man • Reading long manuals • Press ENTER, SPACE, and Q

  25. Help and Documents • GNU info / pinfo(menu display) • info ls • info cat • info info • Search Keyword • man –k • apropos • whatis

  26. Summary • File operations • ls, pwd, cd, cat, echo • CTRL+C, CTRL+Z, kill, jobs • System info • ps, uname, passwd • Help and documents • man, info, apropos, whatis

  27. Questions • Use man and info to read the manual of ls and find out how to distinguish files from directories. • uname can display a lot more system information. Find a way to display the OS “kernel name” and “kernel release”. The expected output is “Linux 3.2.0-36-generic”

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