#Linux list processes how to
#Linux list processes free

e and -f are options to the ps command, and pipes (i.e., | ) take the output of one command and pass it as the input to another. Use the following command, $ ps -ef | grep java Use the following command, $ ps -ef | grep node TIME means total CPU usage of the corresponding processĬMD is the app’s name running (i.e., name of the process, including arguments, if any) You will see a list with the headers as the following line: You can use the following comment to check all running process, including node and java apps etc.

#Linux list processes free

You will need to go into PM2 and dump all node process to free up the port again. If all those kill process commands mentioned above don’t work for you, probably you will need to check if you were using any other packages to run your node process.įor example, if you were running your node process using PM2(a NPM package), the kill command indeed will disable the process but it will keep the port that you ran the nodejs app occupied.

Kill specific process using the following command:.

This is helpful when you are running multipe nodejs application & you want kill specific process for the specific project. It will give list of nodejs process with it’s project name.

If you want know, how many nodejs processes running, you can use the following command.

#Linux list processes how to

For instance, the -t gives only process identifiers without a header, making it helpful in writing scripts.This post provides instructions on how to list running nodeJS application, and how to kill specific process. Just as with fuser, however, if we’re using vi to edit the file, lsof won’t show it as in use. In this case, we see that the file is opened for reading, with FD = 4r. Let’s look at the output when the less command is accessing the file, instead of vi: $ lsof | The FD field can have three parts: file descriptor ( 4 in our case) is the first, a mode character is the second ( u means the file is accessible for reading and writing), and a lock character is the third. To send a signal to a process, use the kill, pkill or pgrep commands we mentioned earlier on. There are multiple signals that you can send to a process, to view all the signals run: kill -l. If the process has threads, we’ll see their identification number, TID, with the task command. The fundamental way of controlling processes in Linux is by sending signals to them. The lsof command returns the process name, the PID, and the user who is running the process. The lsof CommandĬOMMAND PID TID TASKCMD USER FD TYPE DEVICE SIZE/OFF NODE NAME Running the command with the -k option may kill all processes that use the pointed file or directory, so use it with care.

However, that may not always be the case. In this case, the last line of the output is the process we’re looking for. The response is a list of all processes that are accessing files on the same file system. However, we can try finding the process by analyzing and guessing the output of fuser -cv text.txt. The kernel did its job already, so information on the file is not available. When we run the same command, nothing will be returned because vi opens the file, reads its content to memory, and closes it. Let’s say the same file is being accessed by vi. Let’s give it a try to kill the less process, with SIGKILL, using the PID 24815: $ fuser -k text.txt Running the command with the -k option will kill the process that it finds.