Unix Tutorial

Example: ................................................................................................ 101
Unix – Quoting Mechanisms ................................................ 102
The Metacharacters ............................................................. 102
Example: ................................................................................................ 102
The Single Quotes: ................................................................................ 103
The Double Quotes: ............................................................................... 104
The Back Quotes: .................................................................................. 104
Syntax: ................................................................................................... 104
Example: ................................................................................................ 105
Example: ................................................................................................ 105
Unix – IO Redirections ......................................................... 106
Output Redirection: ................................................................................ 106
Input Redirection: ................................................................................... 107
Here Document: ..................................................................................... 107
Discard the output: ................................................................................. 108
Redirection Commands: ......................................................................... 109
Unix – Shell Functions ......................................................... 110
Creating Functions: ................................................................................ 110
Example: ................................................................................................ 110
Pass Parameters to a Function: ............................................................. 111
Returning Values from Functions: .......................................................... 111
Example: ................................................................................................ 111
Nested Functions: .................................................................................. 112
Function Call from Prompt: ..................................................................... 112
Unix - Manpage Help ........................................................... 114
Syntax: ................................................................................................... 114
Example: ................................................................................................ 114
Man Page Sections: ............................................................................... 114
Useful Shell Commands: ........................................................................ 115
Unix - Regular Expressions ................................................. 116
Invoking sed: .......................................................................................... 116
The sed General Syntax: ........................................................................ 116
Deleting All Lines with sed: .................................................................... 117
The sed Addresses: ............................................................................... 117
The sed Address Ranges: ...................................................................... 117
The Substitution Command: ................................................................... 118
Substitution Flags: .................................................................................. 119
Using an Alternative String Separator: ................................................... 119
Replacing with Empty Space: ................................................................. 119
TUTORIALS POINT
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