Unix Tutorial

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Table of Content Unix Tutorial ............................................................................. 2 Audience .................................................................................. 2 Prerequisites ............................................................................ 2 Copyright & Disclaimer Notice .................................................. 2 Unix Getting Started ............................................................... 11 What is Unix ? .......................................................................................... 11 Unix Architecture: ..................................................................................... 11 System Bootup: ........................................................................................ 12 Login Unix: ............................................................................................... 13 To log in: .................................................................................................. 13 Change Password: ................................................................................... 13 Listing Directories and Files: .................................................................... 14 Who Are You? .......................................................................................... 14 Who is Logged In? ................................................................................... 14 Logging Out: ............................................................................................. 15 To log out: ................................................................................................ 15 System Shutdown: ................................................................................... 15 Unix File Management ........................................................... 16 Listing Files: ............................................................................................. 16 Meta Characters: ...................................................................................... 17 Hidden Files: ............................................................................................ 18 Creating Files: .......................................................................................... 18 Editing Files: ............................................................................................. 19 Display Content of a File: ......................................................................... 19 Counting Words in a File: ......................................................................... 19 Copying Files: .......................................................................................... 20 Renaming Files: ....................................................................................... 20 Deleting Files: .......................................................................................... 20 Standard Unix Streams: ........................................................................... 20 Unix Directories ...................................................................... 22 Home Directory: ....................................................................................... 22 Absolute/Relative Pathnames: ................................................................. 22 Listing Directories: .................................................................................... 23 Creating Directories:................................................................................. 23 Creating Parent Directories: ..................................................................... 24 Removing Directories: .............................................................................. 24 Changing Directories: ............................................................................... 24 TUTORIALS POINT Simply Easy Learning
Renaming Directories: .............................................................................. 25 The directories . (dot) and .. (dot dot) ....................................................... 25 Unix File Permission Setup .................................................... 26 The Permission Indicators: ....................................................................... 26 File Access Modes: .................................................................................. 26 1. Read: .................................................................................................... 26 2. Write: .................................................................................................... 27 3. Execute: ............................................................................................... 27 Directory Access Modes: .......................................................................... 27 1. Read: .................................................................................................... 27 2. Write: .................................................................................................... 27 3. Execute: ............................................................................................... 27 Changing Permissions: ............................................................................ 27 Using chmod in Symbolic Mode: .............................................................. 27 Using chmod with Absolute Permissions: ................................................. 28 Changing Owners and Groups: ................................................................ 28 Changing Ownership: ............................................................................... 29 Changing Group Ownership: .................................................................... 29 SUID and SGID File Permission: ............................................................. 29 Unix Environment ................................................................... 31 The .profile File: ....................................................................................... 32 Setting the Terminal Type: ....................................................................... 32 Setting the PATH: .................................................................................... 32 PS1 and PS2 Variables: ........................................................................... 33 Environment Variables: ............................................................................ 34 Java Basic Utilities ................................................................. 36 Printing Files: ........................................................................................... 36 The pr Command: .................................................................................... 36 The lp and lpr Commands: ....................................................................... 37 The lpstat and lpq Commands: ................................................................ 37 The cancel and lprm Commands: ............................................................ 38 Sending Email: ......................................................................................... 38 Unix Pipes and Filters ............................................................ 40 The grep Command: ................................................................................ 40 The sort Command: ................................................................................. 41 The pg and more Commands: .................................................................. 42 Unix Processes Management ................................................ 43 Starting a Process: ................................................................................... 43 Foreground Processes: ............................................................................ 43 TUTORIALS POINT Simply Easy Learning
Page 1 and 2: Unix Tutorial
Page 3: ABOUT THE TUTORIAL Unix Tutorial UN
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
Page 53 and 54: No Plan. Check all the logged in us
Page 55 and 56:
~ ~ ~ ~ ~ ~ ~ ~ "testfile" [New Fil
Page 57 and 58:
Command CTRL+d CTRL+d CTRL+f CTRL+u
Page 59 and 60:
^G U U J Press CNTRL and G keys at
Page 61 and 62:
IMPORTANT: Here are the key points
Page 63 and 64:
POSIX shell ( sh) The different C-t
Page 65 and 66:
CHAPTER 12 Unix- Using Variables Av
Page 67 and 68:
NAME="Zara Ali" unset NAME echo $NA
Page 69 and 70:
Command-Line Arguments: The command
Page 71 and 72:
CHAPTER 14 Unix - Using Arrays Ashe
Page 73 and 74:
CHAPTER 15 Unix - Basic Operators T
Page 75 and 76:
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
Page 95 and 96:
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
Page 101 and 102:
\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 $ret" This wo
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CHAPTER 23 Unix - Manpage Help All
Page 117 and 118:
CHAPTER 24 Unix - Regular Expressio
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Try out the following address range
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sys:x:3:3:sys:/dev:/bin/sh sync:x:4
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[0-9] Matches a single number [a-zA
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(555)555-1213 (555)555-1214 (666)55
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dev /etc /lib /boot /home /mnt /pro
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$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
Page 145 and 146:
CHAPTER 30 Unix - Useful Commands T
Page 147 and 148:
Ispell Emacs ex, edit Emacs Emacs C
Page 149 and 150:
Command Dbx Gdb Make Nm Size Strip
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Reset Reset terminal mode Script Ke
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