OR filter ps command outputs using the less command: Type the following ps command to display all running process: pstree command : Display a tree of processes.pgrep command : Look up or signal processes based on name and other attributes.htop command : Interactive process viewer in Linux.atop command : Advanced System & Process Monitor for Linux.top command : Display and update sorted information about Linux processes.Linux commands show all running processesĪpart from ps command, you can also use the following commands to display info about processes on Linux operating systems: If you want a repetitive update of this status, use top, atop, and htop command as described below. The ps command gives a snapshot of the current processes. Both Linux and UNIX support the ps command to display information about all running process. It provides information about the currently running processes, including their process identification numbers (PIDs). Another process named mysqld provides database service. A process named httpd used to display web pages. Introduction: A process is nothing but tasks within the Linux operating system. Because the script is currently running.How do I see all running process in Linux operating systems using command line or GUI options? How can I show all running Processes in Linux operating system? On the meantime if you run ps aux | grep filename command, it will be shown on the output. It takes some minutes to get the process terminated. #!/bin/bashīut if your script like this, #!/bin/bash It takes a few seconds to display the output and got terminated after it produces the final result. It's all based on the contents of the script.įor example, if you create a script like this. If it shows like this, which means your script is currently running. Output of ps like this means your script is currently not running, $ ps aux | grep hm.shĪvinash 6386 0.0 0.0 15940 932 pts/16 S+ 17:34 0:00 grep -color=auto hm.sh If it not shown by ps, then there may be your script execution is currently terminated. If your script is currently running, it must be shown by ps aux command. We can change this by telling it to exit if it finds something and throw a 1 if it doesn't: ps aux | awk '$12="abc.sh" ' grep will exit with status code 1 (technical fail, triggers ||) if nothing is found but awk will always exit code 0. If you want to control the output or chain on with Bash's & and || operators, you can but you'll need to be a little more clever. ", $11 will be sh and $12 will be abc.sh. Fields $11+ are the command column(s) so if the command is "sh abc.sh. ps aux | awk '$12="abc.sh"'Īwk splits the lines into fields based on whitespace (by default). I would turn to awk for a little panache. You can filter that out but I find all that a little perverse. In your example, you're searching for "abc" but it's pulling back the instance of grep (that's looking for "abc"). My problem with grep is that it's a whole-line parser. Replacing /path/to/ with the location of the abc.sh file and then run abc.sh using /path/to/abc.shĪgain replacing /path/to/ with the location of the abc.sh file. So that the shell will know what application to use to run the script(sh in this case, change it to #!/bin/bash for bash) and then provide executable permissions to the process using: chmod +x /path/to/abc.sh However, if you do want your process to be listed as abc.sh, then you should have the first line of the script you are running as: #!/bin/sh (This will again list your process as sh). You could as well run the top command to check if the process is running or sleeping and the amount of CPU, RAM it is consuming. Z defunct ("zombie") process, terminated but not reaped by its parent W paging (not valid since the 2.6.xx kernel) T stopped, either by a job control signal or because it is being traced S interruptible sleep (waiting for an event to complete) The different process states can be found in the man page for ps: D uninterruptible sleep (usually IO) If it is something other than that, it is not running at the instance you fired the command to check the running processes. You should note that the process will be "running" when the output of ps aux has its STAT as R. This may also return you other process that are running having the string sh anywhere in their output of ps aux. So, the correct way you should have used it is as: ps aux | grep sh Hence, ps aux will not contain the process abc.sh because of which grep could not yield any result. However, in your case, since you ran the process using sh abc.sh, sh is the application(shell) that is running and not abc.sh. Every process will be listed in the output of ps aux whether running, sleeping, zombie or stopped.
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