PID termination

How to Forcibly Kill a Process in Ubuntu Efficiently.


  1. Understanding some unix or linux signal terms
  2. What’s PID
  3. How to view them and kill.

Terms in linux signals

    (1) — Hangup detected on controlling terminal or death of controlling process. Use SIGHUP to reload configuration files and open/close log files.
    (9) — Kill signal. Use SIGKILL as a last resort to kill process. It will not
    save data or cleaning kill the process.
    (15) — Termination signal. It is the default and safest way to kill process.
    The kill and killall command support more than 60 signals. However, most users only need to use signal 9 or 15. To get a full list of signals,

What is PID?

Using the htop command to view processes and kill them

PID termination




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