What is pid in linux
With namespaces, the PID tree is cut off at a certain branch, and only that branch is given to the containerized process. This branch restarts from PID 1, so it appears to the container as if it is running in an entirely fresh Linux install. Which will output a very long list of every running process, which is admittedly a bit hard to scroll through. Though you should be warned that, oddly enough, this will also match the newly created grep process, as ps shows command arguments, which includes your matching string, that obviously matches itself.
A much more useful viewer is the top command, which acts like a Task Manager from your terminal. It shows all processes ordered by CPU usage, as well as some general system stats:. The command to do that is succinctly named kill , which takes a given PID and shuts that process down:. You can also kill all processes with a given name using the killall command.
If you find this tutorial helpful please share with your friends to keep it alive. For more helpful topic browse my website www. To become an author at LookLinux Submit Article. Stay connected to Facebook. I'm Santosh and I'm here to post some cool article for you. If you have any query and suggestion please comment in comment section. Notice: It seems you have Javascript disabled in your Browser. The pidof command is used to find the process ID of the running program.
It prints those IDs into the standard output. In the above output you may have difficulties identifying the process ID because it displays all PIDs including parent and child against the process name. This will be the first number.
In my case it is and it is sorted in descending order. The pgrep command looks at the processes currently running, and lists the process IDs that match the selection criteria. In my case it is Hence please exercise caution while looking at the results.
The pstree command shows running processes as a tree-like format which is very convenient way to display the process hierarchy and makes the output more visually appealing. If a user name is specified in the pstree command then it shows all the processes owned by the respective user. Output is unsorted by default. The PID of Apache2 is Monitor Linux processes using glances , a new real-time process monitoring tool for Linux. Learn more about how to install Glances in Linux systems. Coming back to our point of focus, assuming you already know the PID of a process, you can print its name using the command form below:.
In this section, we will see how to find out a process name using its PID number with the help of user defined format i. Thats it for the moment, if you know any other better way to find out a process name using PID , do share with us via our comment section below. TecMint is the fastest growing and most trusted community site for any kind of Linux Articles, Guides and Books on the web.
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