![]() In this case, you may need to run the command with elevated privileges using sudo. In this case, you may need to use additional options to narrow down the search to the specific process you are looking for.Īnother issue that users may encounter is that the pgrep command may not work if the user does not have permission to access the process information. This can happen if the process name or command line that you are searching for is not unique and matches multiple processes on your system. One common issue that users may run into when using the pgrep command is that it may return unexpected results. Match only processes that are owned by the specified user. Match only processes that are associated with the specified terminal. Match against the session ID instead of the process ID. Match only processes that are children of the given process ID. Select only the oldest (least recently started) of the matching processes. ![]() Select only the newest (most recently started) of the matching processes. Match against the full command line of the process instead of just the process name.ĭisplay the process name in addition to the PID. List only the parent process ID (PID) of the matching processes. The following table lists all the available options for the pgrep command: Optionĭisplay the full command line of the matching processes. It uses almost the same syntax and options as pgrep, providing a quick way to terminate processes without needing their PIDs. This would search for processes running in the background, helping you get a clearer idea of what's actually eating up your CPU cycles.Īnd let's not forget about pgrep's sibling, pkill, which is designed to kill the processes that pgrep identifies. Got a scenario where you've got a bunch of background processes making things messy? You can use pgrep to target those specifically, like this: pgrep -a | grep '&' It's an effective one-liner for shutting down all instances of a program. Here, pgrep firefox lists all Firefox PIDs, which kill then terminates. You can also use pgrep to pipe PIDs into other commands via command substitution, like: kill $(pgrep firefox) This kind of focused search can be invaluable when you're dealing with a lot of processes. This command will list the PIDs of processes that both belong to the user john and match the full command line python script.py. You can also use multiple options in a single command to get more precise results: pgrep -u john -f "python script.py" This command will list the PIDs of all currently running processes that match the full command line of the process python script.py. This command will list the PIDs of all currently running sshd processes owned by the user john. This command will list the PIDs of all currently running Firefox processes. Here are some examples of how to use the pgrep command: pgrep firefox Where PATTERN is the name of the process you want to find and OPTIONS are optional arguments that can be used to modify the behavior of the command. The syntax for the pgrep command is as follows: pgrep PATTERN This command is very useful when you want to find the PIDs of specific processes that are running on your system. The pgrep command is used to find and list the process IDs (PIDs) of currently running processes based on information given by the user.
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