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If you call the top command, you get all the running processes. But how can I limit the output only to a certain process name like "java"?
I've tried this top -l 2 | grep java but in this way you get only snapshots and not a continuously updated list. And top -l 0 | grep java is not really clear.
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To run the top command, type top in the command line and press Enter. The command starts in interactive command mode, showing the active processes and other system information. Customize the view using the available options.
top command option to quit session You need to just press q (small letter q) to quit or exit from top session. Alternatively, you could simply use the traditional interrupt key ^C (press CTRL+C ) when you are done with top command.
Type the ps aux to see all running process in Linux. Alternatively, you can issue the top command or htop command to view running process in Linux.
I prefer the following so I can still use top interactively without having to look up the pids each time I run it:
top -p `pgrep process-name | tr "\\n" "," | sed 's/,$//'` Of course if the processes change you'll have to re-run the command.
Explanation:
pgrep process-name returns a list of process ids which are separated by newlinestr "\\n" "," translates these newlines into commas, because top wants a comma-separated list of process idssed is a stream editor, and sed 's/,$//' is used here to remove the trailing comma
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