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pgrep and pkill - how to terminate processes
Description

You can use the pgrep and pkill commands to identify and stop command processes that you no longer want to run. These commands are useful when you mistakenly start a process that takes a long time to run.

To terminate a process:

a. pgrep - to find out the PID(s) for the process(es).

b. pkill - followed by the PID(s).

The following example illustrates how to find all the processes with a specific name (xterm) and terminate the xterm process that was started last.

# pgrep xterm
17818
17828
17758
18210
# pkill -n 18210

Note: If you need to forcibly terminate a process, use the -9 option to the pkill command.
Example

pkill -9 -n xterm

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