A list of processes as displayed by htop In computing, a process is the instance of a computer program that is being executed. It contains the program code and its activity. Depending on the operating system (OS), a process may be made up of multiple threads of execution that execute instructions concurrently

1. Operation System
Submitted to:
Israt Ferdous
Lecturer
Daffodil International University

2. Processes
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Multitask
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Create illusion
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Context Switch

3. Command Line
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Ps
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Top
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Jobs
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Bg
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Fg
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Kill
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Killall
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Shutdown
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4. Command
Ps Command
PID - Process ID
TTY - Teletype
Time field- The amount of CPU time consumed by the process
show all processes regardless of what terminal are controlled by Type PS X

5. If system is running a lot of processes, ps produces a long list. Then We can apply some comma

7. Top Command

8. Controlling process
Interrupting A Process
Xlogo
Here Job number is 1 and PID = 27956

9. Putting A Process In Background
After entering the command, the xlogo window appeared and the s
Using the jobs command, we can see this list:

10. Returning Process In to Foreground
To return a process to the foreground, use the fg command,
this way
“fg” followed by a percent sign and the job number does
the trick.If we only have one background job,the job number is optional

11. Stopping (Pausing) A Process
we'll want to stop a process without terminating it. This is often done to
allow a foreground process to be moved to the background. To stop a foregroun
After stopping xlogo, We will see that it appears quite dead. We can either resto

12. Signals
The kill command is used to “kill” programs.

13. Common Kill Signal
●Hup
●Int
●Kill
●Term
●Cont
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●Stop
●Quit
●Segv
●Tstp
●Winch
Hangup. This is a vestige of the good old days when terminals were attach

14. Some kill command
INT or Interrupt Performs the same function as the Ctrl-c key sent from

15. Kill ALL Command

16. Some Related Command

17. Thank You