Number 9 signal - KILL (non-catchable, non-ignorable kill)Įxample: ps -ef | grep -e node -e loggerUploadService.sh -e applicationService. Xargs - construct argument list(s) and execute utility Specify multiple patterns, or when a pattern begins with a dash This option is most useful when multiple -e options are used to From my understanding, ps lists the processes and pipes the list to grep. grep has return value (0 or 1) and output. grep's return code is 0 when the output is 1-2 lines. Line is selected if it matches any of the specified patterns. In case grep returns no lines (grep return code 1), I abort the script if I get 1 line I invoke A () or B () if more than 1 line. Specify a pattern used during the search of the input: an input by using this command line: ps -ef grep -v grep grep mongodb. The moment you run the command, there will be two such processes: the process certb itself and the process grep certb. When you now run ps -ef grep certb you get a list of processes that contain the text certb somewhere. The grep utility searches any given input files, selecting lines that Commands that are run as the result of a command substitution also ignore these. Multiple Grep Commands In Linux: Tips And Tricks For >Using Multiple Grep. 1 Answer Sorted by: 2 Let's suppose a process certb is currently running. f Display the uid, pid, parent pid, recent CPU usage, process start e and -f are options to the ps command, and pipes take the output of one command and pass it as the input to another. e Display information about other users' processes, including those Information about all of your processes that have controlling terminals. Ps utility displays a header line, followed by lines containing The solution would be filtering the processes with exact pattern, parse the pid, and construct an argument list for executing kill processes: ps -ef | grep -e -e -e | 1 Answer Sorted by: 31 -e and -f are options to the ps command, and pipes take the output of one command and pass it as the input to another. this will return information on the shell process being run and the ps command that. Process IDs which match the selection criteria to stdout.In bash, using only the basic tools listed in your question (1), you should be able to do: kill $(ps aux | grep 'ython csp_build.py' | awk '' | xargs sudo kill -klevel 2023 ps aux grep kate you can use this brackets with every. As an exam- ple, executing this on the command line produces output similar to the following : / bin / ps -ef grep sshd Here you are looking for all. Pgrep looks through the currently running processes and lists the Pgrep, pkill - look up or signal processes based on name and other grep -q string file, in backticks (or inside (.), which is preferable ), will be replaced by the output of grep. Instead, use pgrep which is designed to do precisely what you want: NAME As is so often the case, there's an app for that!ĭon't use grep + ps. This renders the elenium trick useless since what is actually passed to grep is selenium and not elenium so the grep will match itself.Īll this, however, only happens because you're not using the right tool for the job. Because you haven't quoted the expression you gave to grep (because you used elenium and not 'elenium' or "elenium"), the shell will treat it as a glob and expand it to the matching file name. This becomes more complicated if, as seems to be the case for you, you have a file called foo in your current directory. However, the grep process showing up in the ps results will have the string oo and is, therefore, not found by grep. Since the only character in the brackets is f, oo is equivalent to foo. Since grep works with regular expressions, it will treat as "any character in the list of characters inside the brackets". You either add a grep -v grep at the end of the pipe, or you use grep oo instead. There are two common, if convoluted, workarounds for this. Running ps aux | grep foo is problematic since the grep foo command itself will match foo and so appear in the output. The problem here, as perceptively figured out, is that the shell is expanding the glob characters in your search string to a matching filename before passing the string on to grep.
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