Ethical Hacking and Penetration Testing Guide

 2 
Linux Basics ...............................................................................................................19
Major Linux Operating Systems .......................................................................................19
File Structure inside of Linux ........................................................................................... 20
File Permission in Linux ......................................................................................... 22
Group Permission .......................................................................................... 22
Linux Advance/Special Permission ................................................................ 22
Link Permission ............................................................................................. 23
Suid & Guid Permission ................................................................................ 23
Stickybit Permission ...................................................................................... 23
Chatter Permission ........................................................................................ 24
Most Common and Important Commands ............................................................ 24
Linux Scheduler (Cron Job) ..............................................................................................25
Cron Permission ..................................................................................................... 26
Cron Permission ............................................................................................ 26
Cron Files ...................................................................................................... 26
Users inside of Linux ....................................................................................................... 28
Linux Services......................................................................................................... 29
Linux Password Storage .......................................................................................... 29
Linux Logging ........................................................................................................ 30
Common Applications of Linux ...................................................................................... 30
What Is BackTrack? ......................................................................................................... 30
How to Get BackTrack 5 Running ..........................................................................31
Installing BackTrack on Virtual Box .......................................................................31
Installing BackTrack on a Portable USB ..................................................................35

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Contents
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vii
Installing BackTrack on Your Hard Drive .............................................................. 39
BackTrack Basics .................................................................................................... 43
Changing the Default Screen Resolution ......................................................................... 43
Some Unforgettable Basics ...................................................................................... 44
Changing the Password ................................................................................. 44
Clearing the Screen ....................................................................................... 44
Listing the Contents of a Directory ............................................................... 44
Displaying Contents of a Specific Directory .................................................. 44
Displaying the Contents of a File ....................................................................45
Creating a Directory .......................................................................................45
Changing the Directories ...............................................................................45
Windows ........................................................................................................45
Linux ..............................................................................................................45
Creating a Text File ........................................................................................45
Copying a File ................................................................................................45
Current Working Directory ............................................................................45
Renaming a File .............................................................................................45
Moving a File ................................................................................................ 46
Removing a File ............................................................................................. 46
Locating Certain Files inside BackTrack ................................................................. 46
Text Editors inside BackTrack .......................................................................................... 46
Getting to Know Your Network .......................................................................................47
Dhclient ...................................................................................................................47
Services ............................................................................................................................ 48
MySQL ................................................................................................................... 48
SSHD ..................................................................................................................... 48
Postgresql ................................................................................................................ 50
Other Online Resources ...................................................................................................51