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Monday, 5 March 2012

Learn Linux Commands on Backtrack Environment


Backtrack 5 : Linux Commands  
Learn Linux Commands on Backtrack Environment

There are many tools through which you can monitor your Backtrack 5 
There are various commands through which you can open your Linux Tools.
There are many built-in-tools makes your job easy .
Learn it , Gain it  and Enjoy it.
Only On Backtrack 5

To monitor these process there are certain build-in-tools on every Linux Operating System through which you can Monitor your system .Also there are other tools which are not install on the system but you can install it simply using apt-get install <package name > command .

Here we learn how to use -
  1. whoami command
  2. uptime command
  3. uname command
  4. free command
  5. df command 
  6. w command
  7. hostname command 

Let start with whoami  commands -



1. Whoami Command : It display the user information who is currently logged in. 
Syntax :- whoami 

For Example :When we give whoami command on Backtrack 5 ,its 
             showed the user info.


Above image showed that the current user is " root ".

2.Uptime Command : Uptime Command is used to from how long   the your System has been running , it also tells how many users are running and the load average .

Syntax : uptime

For Example : When we give uptime command then let see what happen on Backtrack 5


3. uname command : It displays the system information like OS name , OS type etc .

Syntax : uname : This command only show the OS name.
         uname -a : This command show complete info .

For Example : When I give uname and uname -a , see what happen in   
              below image -



4.top command : It shows the real-time system process
                     running on your system.

Syntax : top 

For Example : When we give top , see what happen on our system.


  • Here you can see the PID(ProcessID),User information, Cpu Performance , Your MEM(Memory)Performane ,TIME,COMMAND etc.
  • With top you can monitor your system activities.
  • Even you can kill any process from here only .
  • You can change the color of it by pressing z.
For Example : When i press z,the color will change ,see below-



5.free command : free command display the total memory, used memory used memory, shared memory, free memory, buffer memory and cached memory .

Syntax : free : It display info in Kb sizes
         free -m : It display info in MB(MegaByte)Blocks
         free -m -s <number> : It display memory info in seconds.
          
Example :When we use above commands , the output look like this -




6.df command : It display the amount of free space available on each partition.

Syntax : If you want to view syntax on your own system then type df --help . It displays the syntax and all the [options] are availabe for this command as shown below -




EXAMPLES:Lets use this syntax with options and see what happen in each example .

EXAMPLE 1 : df command 


Here it shows the Used and Available Space on each partition.

EXAMPLE 2: Command : df -all


It display all the dummy file system .

EXAMPLE 3 :Command : df -h              // Human Readable Format 



EXAMPLE 4 : Command : df -i       //It list the inode information


7. w command : w command reports how many users are on the system and what process they are running .

Syntax : Use w --help cpmmand to view syntax on your system .


EXAMPLE 1: Command : w 


EXAMPLE 2 :Command :w -h root, w -l root, w -s root,w -u root 


Example 3 : Command:w -f root, w -o root , w -V 



8. hostname : It display and sets any name into hostname .

Syntax : hostname [options]



EXAMPLE 1 :COMMAND :hostname : It simple display hostname .


EXAMPLE 2 : Command :hostname -s,-a,-i,-I,-f,-b


EXAMPLE 3 :Set the hostname of the system to "www.hackingDNA.com"


To set the name you have to enter the command :

Syntax :root@bt:~#hostname <Any name>

Example
root@bt:~#hostname www.hackingDNA.com  
root@bt:~#
root@bt:~#hostname      // Type host command to display hostname
www.hackingDNA.com      //Here your system name is set .

These are the few commands i have taken , next time i promise to come more linux commands.
This is the END of this tutorial . Always remember to be a good hacker, ethical hacker , system admin, Network secuity in any field of IT ,concepts of commands, concept of system architecture should be very clear then only you achieve any success . 
 And other people who are sitting idle what to do with backtrack 5 ,this is for you guys , analysize your machine through these commands . And at last if you like this tutorial always put your comments here and on my hackingDNA 



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