You can pipe the output from ps through grep toВ list entries that have names that match the search term. This makes it easier to track which processes are the parents of other processes. The option to do this is the -forest option. To add a little more clarity, we can ask ps to add some ASCII lines and to draw the hierarchy as a tree.

The indentation indicates which processes are parents of which other processes. We use the -H (hierarchy) option to do so. Sometimes it can help to figure out an issue or identify a particular process if you can see which processes launched other processes. The entries with a question mark ? in the TTY column were not started from a terminal window. WeвЂ™ve got many more entries in the list, but we see the same four columns as before. Because this is going to be a long list, weвЂ™re piping it into less. CMD: The name of the command that launched the processД«y adding the -e (select all processes) we can make ps list the processes that have been started by all users, not just the user who is running the ps command.TIME: The amount of CPU processing time that the process has used.TTY: The name of the console that the user is logged in at.PID: The process ID number of the process.Ps displays a list of the processes started by the user who ran the command. The easiest way to use ps is to fire it up with no parameters: ps The options described here will cater for most commonplace needs.В If you need to go deeper into ps than weвЂ™ve taken it in this article, youвЂ™ll find that our introduction makes the man page easier to digest. Ps is flexible enough to give you precisely the information you need in exactly the format youвЂ™d like it.В In fact, ps has a great many options. It gives you a snapshot of what is happening inside your computer вЂњright now.вЂќ The ps command satisfies both of these needs. Perhaps youвЂ™re just curious about which processes are running inside your computer, and youвЂ™d like to peek beneath the hood. Of course, is to identify the process in question.Д«ut maybe you donвЂ™t have any task or performance issues at all. Sometimes tasks need to be killed as a mercy to everyone involved. Or they may continue running, but gobble up too much CPU time or RAM, or behave in some equally anti-social way. Sometimes tasks can lock-up, or enter a tight loop, or become unresponsive for other reasons. These have to be juggled in real-time so that all running processes get their fair share, according to the priority of each task. Amongst its many responsibilities is the allocation of system resources such as RAM and CPU time. The beating heart of all Linux and Unix-like operating systems is the kernel.

Ubuntu get process cmd c