Unix Tutorial

Address Substitution: ............................................................................. 119
The Matching Command: ....................................................................... 120
Using Regular Expression: ..................................................................... 120
Matching Characters: ............................................................................. 121
Character Class Keywords: .................................................................... 122
Aampersand Referencing: ...................................................................... 122
Using Multiple sed Commands: .............................................................. 123
Back References: ................................................................................... 123
Unix – File System Basics .................................................... 125
Directory Structure: ................................................................................ 125
Navigating the File System: .................................................................... 126
The df Command: .................................................................................. 127
The du Command: ................................................................................. 127
Mounting the File System: ...................................................................... 128
Unmounting the File System: ................................................................. 128
User and Group Quotas: ........................................................................ 128
Unix – User Administration ................................................... 130
Managing Users and Groups: ................................................................ 130
Create a Group ...................................................................................... 131
Modify a Group: ...................................................................................... 131
Delete a Group: ...................................................................................... 131
Create an Account ................................................................................. 132
Modify an Account: ................................................................................. 132
Delete an Account: ................................................................................. 133
Unix – System Performance ................................................ 134
Peformance Components: ...................................................................... 134
Peformance Tools: ................................................................................. 135
Unix – System Logging ........................................................ 136
Syslog Facilities: .................................................................................... 136
Syslog Priorities: .................................................................................... 137
The /etc/syslog.conf file: ......................................................................... 138
Logging Actions: ..................................................................................... 138
The logger Command:............................................................................ 139
Log Rotation: .......................................................................................... 139
Important Log Locations ......................................................................... 139
Unix – Signals and Traps ..................................................... 140
List of Signals: ........................................................................................ 140
Default Actions: ...................................................................................... 141
Sending Signals: .................................................................................... 141
TUTORIALS POINT
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