Question

Exercise 1:

Start and Stop Multiple Processes

Exercise 2:

Use top command to display real time information about the processes and to control them.

Submission:

A word document with the screenshots as an evidence of what you have observed.

on Linux makes this in the terminal as a command

Answer 1

Exercise 1 :

Start and stop multiple porcesses :

First of all, we have to know that a program's instance is called as processes, that is, if we give any commands to the linux_machine it will result in a process.

To start a process in using linux command, the casual way is to type the name and push return.

Then, we can use ps-ef command to list all the commands that are in the state of running :

For example:

In the above :

• UID is the name of the user
• PID the ID number of the process
• PPID is the parent process
• STIME is the time at which process started
• TTY is the procesess' terminal for control
• TIME is the time for the exeution
• CMD is the name for the command

Well, now we have all the processes running, we want to stop or kill many among those processes,

therefore we will be using pkill or killall command that can kill a process or processes, we do not have identify the process by their PID, rather we can use a term that is used in any of the running processes.

Suppose we want to kill all of the chrome processes, we can use the following commands :

killall chrome

If we want to kill multiple processes in a selective manner, we can first list them and then can decide a/c to teir PID's if we wanna kill them : For eg :

ps aux | grep chrome 
kill -9 pid1 pid5

Exercise 2 :

Top commands to display real time processes and their controls :

Top command is used to display real-time informations, we can know many things like processing, memory or CPU consumption and so on.

1. Show real-time processes :
   • We can simply use top that will display memory,cpu, tasks and will stay in real-time, ie keep updating until you get to press q for quitting.
   • 
2. Sorting through results :
   • We can press SHIFT+O to get sorted results for the fields, we can also press a to sort with PID
   • 
3. We can show for specific_user_processes :
   • For eg, we can use top -u tecmint, that will show process named with that user
   • 
4. We can also highlight the processes that are running :
   • Just press z, and the processes that are running will be colored
   • 
5. We can also the processes' path:
   • Just press c path for the precesses will be shown
   • 
6. There are few more commands for top we can further discuss:
   • We can press k after we have find the porcess with its particular PID
   • We can press SHIFT+P to sort the processes by usage of CPU
   • The exciting command is this below command that outputs and save the results of processes in the given output file.

     # top -n 1 -b > top-output.txt
     

   • We can also exit the top command , when after we have done certain repititions, let's say for now 10, then command is :

     # top -n 10
     

Summary : Above explained the two questions, that is in first, how to start and stop or kill multiple preocesses and second, using of top command in real-time and their processes to control them, I have explained both the questions very thoroughly, and yes, if you want the word format just copy the above materials and save it as a word format. I hope now the answers are explained thoroughly.

P.S. Hope you are satisfied with the provided solution, please give a thumbs up, Good Day !