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If you're suspicious that a specific user is overloading your system, there are several commands that can help. Of course, the first command for process management is top. As discussed in another video, the top command can help monitor the processes for show stopping problems. Note how it can review systems for processes that overload RAM memory, as well as CPU. In this case, this cc1 process looks a little suspicious, or at least looks like a process that may be ready to overload my system. When processes overload a system the simplest option is to stop the process with the kill command. And the top command makes it easy because it identifies the PID of the process, which you can then use with the kill command. Furthermore, if one specific user has a number of problem processes you may want to investigate further. The ps aux command lists all currently running processes, which can then be grep by user. This command lists all running processes for my account. Alternatively these processes can be broken down in a different format. The pstree command sets up processes in a hierarchy so you can tell which processes start others. If you want to use it to help you understand how users are setting up their processes, run the pstree dash u user name command. This command analyzes the process tree associated with my account.