How to check runing time for already #running #process in #linux #shor...

To determine how long a process has been running in Linux using its Process ID (PID), you can use the ps command in combination with the -o (output format) option to display the elapsed time. Here's how you can do it:

Open your terminal and enter the following command, replacing [PID] with the actual PID of the process you want to check:

bash

ps -p [PID] -o etime=

-p [PID]: Specifies the PID of the process you want to examine.

-o etime=: Specifies the output format for the elapsed time of the process.

This command will display the elapsed time in the format DD-HH:MM:SS, indicating the number of days, hours, minutes, and seconds the process has been running.

For example, if you want to check the running time of a process with PID 12345:

bash

ps -p 12345 -o etime=

The output will look something like this:

01-23:45:12

In this example, the process has been running for 1 day, 23 hours, 45 minutes, and 12 seconds.