Lecture 01: Welcome and Intro What LSD and Unix Have in Common

Lecture 01: welcome and intro what LSD and Unix have in common

Hands-On Unix System Administration DeCal

2012-08-27 1 / 21 The connection

❖ The connection “Two of the most Introduction Diving into the shell famous products of Text editing Berkeley are LSD and Unix. I don’t think that this is a coincidence.”

(from The Unix-Haters Handbook)

2 / 21 ❖ The connection

Introduction ❖ What is this? ❖ Who are we? ❖ What is Unix? ❖ What is sysadmining? Introduction ❖ Logistics Diving into the shell

Text editing

3 / 21 What is this?

❖ The connection ● CS 98/198-8, the Hands-on Unix Introduction ❖ What is this? system administration DeCal ❖ Who are we? ❖ What is Unix? ● decal.ocf.berkeley.edu ❖ What is sysadmining? ❖ Logistics ● Don’t be shy. Ask questions in class or Diving into the shell on Piazza. Text editing

4 / 21 Who are we?

❖ The connection ● Dara Adib: 3rd-year CivE; OCF general Introduction ❖ What is this? manager, Kloudless DevOps ❖ Who are we? ❖ What is Unix? ● Felix Wong: 4th-year EECS; OCF site ❖ What is sysadmining? ❖ Logistics manager, ResComp sysadmin Diving into the shell ● Jessica Yu: 3rd-year CS; ResComp Text editing sysadmin

5 / 21 What is Unix?

❖ The 1970 1980 1990 2000 Time connection FreeBSD 7.2 BSD family NetBSD 5.0 Introduction OpenBSD 4.5 ❖ What is this? BSD (Berkeley Software Distribution)

Bill Joy ❖ Who are we? SunOS 4.1.3 ❖ Darwin What is NextStep 3.3 Unix? MacOS X 5.7 Xenix OS Apple Computer ❖ What is Microsoft/SCO GNU/Hurd K16 sysadmining? GNU Project ❖ Richard Stallman GNU/Linux 2.6.30.1 Logistics Minix Linus Torvalds 3.1.3a Andrew S. Tanenbaum Diving into the Research UNIX 10 shell Bell Labs: Ken Thompson, Dennis Ritchie, et al. Commercial UNIX UnixWare AT&T Univel/SCO Text editing Solaris 10 5/09 Sun Microsystems System III & V family HP-UX 11i v3

AIX 7.1.4 MP4 6.1 IBM IRIX 6.5.30 SGI https://en.wikipedia.org/wiki/File:Unix_history.svg

6 / 21 What is sysadmining?

❖ The connection

Introduction ❖ What is this? ❖ Who are we? ❖ What is Unix? ❖ What is sysadmining? http://xkcd.com/705/ ❖ Logistics Diving into the shell

Text editing

7 / 21 Logistics

❖ The connection ● lecture-lab format: lab due at start of Introduction ❖ What is this? next week’s class ❖ Who are we? ❖ What is Unix? ❖ What is ✦ lab 6= homework sysadmining? ❖ Logistics Diving into the shell ● grading: attendance, labs, ﬁnal project Text editing ● bring laptop if possible

8 / 21 ❖ The connection

Introduction Diving into the shell ❖ The shell ❖ In a nutshell ❖ Common Diving into the shell shells ❖ Basic programs ❖ Basic programs ❖ Basic programs ❖ Saving keystrokes ❖ RTFM ❖ Unix paradox ❖ ls -l

Text editing 9 / 21 The shell

❖ The connection ● an ordinary program (e.g., bash) that Introduction Diving into the lets you access the system shell ❖ The shell ❖ In a nutshell ✦ ❖ Common text-based shells ❖ Basic programs ❖ Basic ● programs edit ﬁles, run other programs, etc. ❖ Basic programs ❖ Saving ● can be automated with shell scripting keystrokes ❖ RTFM ❖ Unix paradox ❖ ls -l

Text editing 10 / 21 In a nutshell

❖ The connection ● there’s a prompt Introduction Diving into the shell ● type something ❖ The shell ❖ In a nutshell ❖ Common ● read output shells ❖ Basic programs ❖ Basic ● repeat programs ❖ Basic programs ❖ Saving keystrokes ❖ RTFM ❖ Unix paradox ❖ ls -l

Text editing 11 / 21 Common shells

❖ The connection ● sh/bash Introduction Diving into the shell ● csh/tcsh ❖ The shell ❖ In a nutshell ❖ Common ● zsh shells ❖ Basic programs ❖ Basic ● fish programs ❖ Basic programs ❖ Saving keystrokes ❖ RTFM ❖ Unix paradox ❖ ls -l

Text editing 12 / 21 Basic programs

❖ The connection ● pwd: print working directory Introduction Diving into the shell ● ls: list ﬁle ❖ The shell ❖ In a nutshell ❖ Common ● cd: change working directory shells ❖ Basic programs ❖ Basic ● mkdir: make directory programs ❖ Basic programs ● ❖ Saving rmdir: remove empty directory keystrokes ❖ RTFM ❖ Unix paradox ❖ ls -l

Text editing 13 / 21 Basic programs

❖ The connection ● touch: create/access file Introduction Diving into the shell ● mv: move file ❖ The shell ❖ In a nutshell ❖ Common ● cp shells : copy file ❖ Basic programs ❖ Basic ● rm: remove file programs ❖ Basic programs ❖ Saving keystrokes ❖ RTFM ❖ Unix paradox ❖ ls -l

Text editing 14 / 21 Basic programs

❖ The connection ● echo: print text Introduction Diving into the shell ● cat: print file ❖ The shell ❖ In a nutshell ❖ Common ● less (more): scroll (“page”) through shells ❖ Basic programs file ❖ Basic programs ❖ Basic ● grep: search file for specified pattern programs ❖ Saving keystrokes ❖ RTFM ❖ Unix paradox ❖ ls -l

Text editing 15 / 21 Saving keystrokes

❖ The connection ● command history Introduction Diving into the shell ● tab-completion ❖ The shell ❖ In a nutshell ❖ Common shells ❖ Basic programs ❖ Basic programs ❖ Basic programs ❖ Saving keystrokes ❖ RTFM ❖ Unix paradox ❖ ls -l

Text editing 16 / 21 RTFM

❖ The connection ● programs have command line options. Introduction Diving into the shell ✦ e.g., ls -l ❖ The shell ❖ In a nutshell ❖ Common shells ❖ Basic ● programs are (usually) documented programs ❖ Basic programs ❖ Basic ✦ e.g., man ls, ls --help programs ❖ Saving keystrokes ❖ RTFM ● ❖ Unix paradox search manpages with apropos (or ❖ ls -l Google) Text editing 17 / 21 Unix paradox

❖ The connection Good Unix programs are

Introduction Diving into the ● simple shell ❖ The shell ❖ In a nutshell ● ❖ Common do one thing well shells ❖ Basic programs “cat came back from Berkeley waving ❖ Basic programs ❖ Basic ﬂags” (Rob Pike [Unix minimalist]) programs ❖ Saving keystrokes ❖ RTFM ❖ Unix paradox ❖ ls -l

Text editing 18 / 21 ls -l

❖ The connection ● ﬁlenames preceded with a dot are Introduction Diving into the hidden by default shell ❖ The shell ❖ In a nutshell ✦ e.g., .bashrc ❖ Common shells ❖ Basic programs ❖ Basic ● programs special directories ❖ Basic programs ❖ Saving ✦ keystrokes . (one dot): current directory ❖ RTFM ❖ Unix paradox ✦ .. (two dots): parent directory ❖ ls -l

Text editing 19 / 21 ❖ The connection

Introduction Diving into the shell

Text editing ❖ vi(m) Text editing

20 / 21 vi(m)

❖ The connection “I was trying to make it usable over a 300 Introduction baud modem” (Bill Joy [Berkeley graduate Diving into the shell student]) Text editing ❖ vi(m) ● modal text editor: normal mode, insert mode

● vimtutor

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