Unix Tutorial

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UNIX TUTORIAL Simply Easy Learning by tutorialspoint.com tutorialspoint.com i
ABOUT THE TUTORIAL Unix Tutorial UNIX is a computer Operating System which is capable of handling activities from multiple users at the same time. Unix was originated around in 1969 at AT&T Bell Labs by Ken Thompson and Dennis Ritchie. This tutorial gives a very good understanding on Unix. Audience This tutorial has been prepared for the beginners to help them understand them basic to advanced concepts covering Unix commands, UNIX shell scripting and various utilities. Prerequisites We assume you have little knowledge about Operating System and its functionalities. A basic understanding on various computer concepts will also help you in understanding various exercises given in this tutorial. Copyright & Disclaimer Notice All the content and graphics on this tutorial are the property of tutorialspoint.com. Any content from tutorialspoint.com or this tutorial may not be redistributed or reproduced in any way, shape, or form without the written permission of tutorialspoint.com. Failure to do so is a violation of copyright laws. This tutorial may contain inaccuracies or errors and tutorialspoint provides no guarantee regarding the accuracy of the site or its contents including this tutorial. If you discover that the tutorialspoint.com site or this tutorial content contains some errors, please contact us at webmaster@tutorialspoint.com TUTORIALS POINT Simply Easy Learning
Page 1: Unix Tutorial
Page 5 and 6: Renaming Directories: .............
Page 7 and 8: Extended Shell Scripts: ...........
Page 9 and 10: Example: ..........................
Page 11 and 12: Trapping Signals: .................
Page 13 and 14: The main concept that unites all ve
Page 15 and 16: New UNIX password:******* Retype ne
Page 17 and 18: CHAPTER 2 Unix File Management All
Page 19 and 20: Displays all the files whose name s
Page 21 and 22: 4. Fourth Column: represents file n
Page 23 and 24: CHAPTER 3 Unix Directories Adirecto
Page 25 and 26: Creates the directories docs and pu
Page 27 and 28: CHAPTER 4 Unix File Permission Setu
Page 29 and 30: $ls -l testfile -rw-rwxrwx 1 amrood
Page 31 and 32: The SUID and SGID bits will appear
Page 33 and 34: Note - The shell initialization pro
Page 35 and 36: The default secondary prompt is > (
Page 37 and 38: CHAPTER 6 Java Basic Utilities So f
Page 39 and 40: laserp-574 grace 82744 Nov 7 11:28
Page 41 and 42: CHAPTER 7 Unix Pipes and Filters Yo
Page 43 and 44: This pipe sorts all files in your d
Page 45 and 46: The process runs in the foreground,
Page 47 and 48: $kill -9 6738 Terminated Parent and
Page 49 and 50: CHAPTER 9 Unix Communication When y
Page 51 and 52: prompt on Turns prompt on. Dir List
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No Plan. Check all the logged in us
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~ ~ ~ ~ ~ ~ ~ ~ "testfile" [New Fil
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Command CTRL+d CTRL+d CTRL+f CTRL+u
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^G U U J Press CNTRL and G keys at
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IMPORTANT: Here are the key points
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POSIX shell ( sh) The different C-t
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CHAPTER 12 Unix- Using Variables Av
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NAME="Zara Ali" unset NAME echo $NA
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Command-Line Arguments: The command
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CHAPTER 14 Unix - Using Arrays Ashe
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CHAPTER 15 Unix - Basic Operators T
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val=`expr $b / $a` echo "b / a : $v
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else echo "$a -ge $b: a is not grea
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!= Checks if the value of two opera
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] is true. -x file Check if file is
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Right shift == String comparison fo
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-r file Checks if file is readable
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Example: #!/bin/sh a=10 b=20 if [ $
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There is only one form of case...es
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CHAPTER 17 Unix - Shell Loops Loops
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done This will produce following re
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4) juice 5) appe 6) all 7) none #?
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CHAPTER 18 Unix - Loop Control So f
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1 0 1 5 The continue statement: The
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\n new line \r carriage return \t h
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CHAPTER 20 Unix - Quoting Mechanism
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The Double Quotes: Try to execute t
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CHAPTER 21 Unix - IO Redirections M
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EOF 3 $ This is a simple lookup pro
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CHAPTER 22 Unix - Shell Functions F
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echo "Return value is $ret" This wo
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CHAPTER 23 Unix - Manpage Help All
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CHAPTER 24 Unix - Regular Expressio
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Try out the following address range
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sys:x:3:3:sys:/dev:/bin/sh sync:x:4
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[0-9] Matches a single number [a-zA
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(555)555-1213 (555)555-1214 (666)55
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dev /etc /lib /boot /home /mnt /pro
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$du -h /etc 5k /etc/cron.d 63k /etc
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CHAPTER 26 Unix - User Administrati
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$ groupdel developer This removes o
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CHAPTER 27 Unix - System Performanc
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CHAPTER 28 Unix - System Logging Un
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The combination of facilities and l
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Unix - Signals and Traps CHAPTER 29
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Trapping these signals is quite eas
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CHAPTER 30 Unix - Useful Commands T
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Ispell Emacs ex, edit Emacs Emacs C
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Command Dbx Gdb Make Nm Size Strip
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Reset Reset terminal mode Script Ke
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