Linux Commands Tutorial - 5 | Linux Tutorial

 In the previous article, we had learned about the following:

1. We have seen how we can create more than one file or directory.

2. We saw a little more of the echo command.

3. Cat Command

4. head Command

5. tail Command

6. stat Command

7. du Command

8. We have learned about md5sum Command.

Let's continue further...

Linux Commands

#ps Command: It will show nothing but a snapshot of the currently running process.

    Let's create a new process.

    Input: sleep 60 &

    Output: You will get an ID like 12582(In your case it could be different)

    Now, type: ps

    Output: You will see the process id on the screen

Again, type: ps

Output: You will see the sleeping process. 

Let's see how to kill/stop the running process. For that we have this command:

#kill Command: It will kill/stop the running process

    Input: kill 12582

    Output: It will kill/stop the process.

Now, if you again check the running process list with the ps command, It will not show you the process you have killed before.

Sometimes, some processes won't die with the simple kill command, in that case, we use the " -9 " option.

Input: kill -9 12582

#killall Command: It will kill all the processes simultaneously. 

    For Example: let's create two new processes

        Input: sleep 30 &

        Input: sleep 30 &

    Now, if you check the running processes, it will show you both the sleep process.

        Input: kill all sleep

        Output: Terminated sleep 30

#killall -u username Command: It will kill all the processes started by a user.

    Input: killall -u Roshan 

    Output: It will kill all the processes created by me.

#pidof bash Command: It will provide you the process id (Pid) of running program bash.

#pidof -s bash Command: It will only have one running process ID, instead of all the running program bash.

Quick Recap:

1. ps Command: It shows the snapshot of the currently running process.

2. sleep Command: It is used to create a process.

3. kill Command:  It is used to kill/stop a running process.

4. kill all Command: It is used to kill/stop all the running processes simultaneously.

5. kill all -u username Command: It is used to kill all the processes started by the user.

6. pidof bash Command: It shows you the process id (PID) of running program bash.

7. pidof -s bash Command: It will show you only one running process rather than all running processes.

Previous Articles:

#Networking For Hacking:

1. Introduction to Networking 

2. Networking Devices

3. Transmission Media(Guided and Unguided)

4. Switching in Networking

5. OSI Model

6. OSI Model - Part 2

7. Functions of OSI Layers

8. TCP/IP Model

9. OSI vs TCP/IP

10. Internet Protocol(IP)

11. Internet Protocol Versions | Internet Versions Explained

#Linux for Absolute Beginners:

1. Introduction of New Blog

2. More on Linux

3. Installation

4. Linux Commands - Part 1

5. Linux Commands - Part 2

6. Linux Commands - Part 3

7. Linux Commands - Part 4

8. Linux Commands - Part 5

9. All Files & Directories Commands

10. File Editor & Manipulating Data Commands

11. All Programming Languages Commands

#Penetration Testing Tutorial for Absolute Beginners

1. Introduction to Penetration Testing

2. What is N-Map?

#Technical Tools Explanation

1. Log4J Tutorial

#Linux for Absolute Beginners in Hindi

1. Introduction of New Blog in Hindi