To work with processes, we will provide several frequently used commands. With their help, you can search, filter by type, and also force their completion.
1. To view the list of processes
ps aux
2. To search for a process by name, where nginx is the process we are interested in
ps aux | grep nginx
2.1 Having found out the PID of a process, we can get detailed information about it, in our example 542
lsof -p 542
2.2 Displaying a list of processes using tcp ports
lsof -nP -iTCP -sTCP:LISTEN
2.3 Finding a process that occupies a specific port, in our example 443
lsof -nP -iTCP:443 -sTCP:LISTEN
3. Ending the process
3.1 To terminate a process by name, use the command where nginx is the process name
killall nginx
3.2 Force termination of a process by PID, in our case 473, where 9 is the maximum priority
kill -9 473
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