Fuser Command in Linux

Introduction

Files and folders in Linux are accessed by processes of a particular identity. You must know the id of the specific process if you want to perform any action on that process.

It is among the most important tasks of Linux systems administrators. It is involved in a number of activities under supervision, signaling processes, and setting the priorities of processes on the system.

Now we’re gonna teach you to find processes by using the fuser command in Linux.

The syntax of the fuser command

The popular syntax:

$ fuser [options] [file|socket]

$ fuser [options] -SIGNAL [file|socket]

$ fuser -l

Or you can look up usage with the command:

$



  


            
   

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 fuser

Output:

Using the fuser command

1. Checking the process detail accessing

$ fuser -v .

Output:

In the above command, it displayed USER, PID, ACCESS and COMMAND.

For example, I want to check the processes accessing of file test:

$ fuser -v -m test

Output:

2. Killing signal

For example, to kill all the processes, run the command:

$ fuser -k .

Output:

Using -ki option to ask yes/no:

$ fuser -ki .

Output:

3. Listing all signals:

$ fuser -l

Output:

Conclusion

We just taught you to find processes by using the fuser command in Linux.

Thank you for reading!

Karim Buzdar

Karim Buzdar holds a degree in telecommunication engineering and holds several sysadmin certifications including CCNA RS, SCP, and ACE. As an IT engineer and technical author, he writes for various websites.