kill — Send a signal to a process, usually related to stopping the process. All signals except for SIGKILL and SIGSTOP can be intercepted by the process to perform a clean exit.
# source: tldr · verified

Examples:
  # Terminate a program using the default SIGTERM (terminate) signal [GNU]
    $ kill process_id
  # List signal values and their corresponding names (to be used without the `SIG` prefix). The available options may depend on the `kill` implementation [GNU]
    $ kill -l|-L|--table
  # Terminate a background job [GNU]
    $ kill %job_id

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