What is the “graceful” method for stopping a process in Ubuntu 20.04? (2 possible answers)

There are two common methods to gracefully stop a process in Ubuntu 20.04:

1. Using the 'kill' command: This is a command-line utility that sends signals to processes. To gracefully stop a process, you would typically send the 'TERM' signal, which requests the process to terminate. Here are the steps:

   • First, you need to find the Process ID (PID) of the process you want to stop. You can do this by using the 'ps' command or the 'pgrep' command. For example, if you want to find the PID of a process named 'myprocess', you would type 'pgrep myprocess' in the terminal.

   • Once you have the PID, you can send the 'TERM' signal to it using the 'kill' command. For example, if the PID of 'myprocess' is 1234, you would type 'kill 1234' in the terminal. This sends the 'TERM' signal to the process, requesting it to terminate.

2. Using the 'pkill' command: This is a command-line utility that sends signals to processes based on their names. To gracefully stop a process, you would typically send the 'TERM' signal, which requests the process to terminate. Here are the steps:

   • You can send the 'TERM' signal to a process named 'myprocess' by typing 'pkill myprocess' in the terminal. This sends the 'TERM' signal to the process, requesting it to terminate.

Remember, these methods only request the process to terminate. It's up to the process to actually honor this request. Some processes may not respond to the 'TERM' signal, in which case you may need to use the 'KILL' signal instead. However, the 'KILL' signal is not considered 'graceful' because it forcibly terminates the process without giving it a chance to clean up.