If you want more details about the process run the command with the â-vâ option. It is most widely used to get the information of the process running on a specific port.įor example the command given bwlow will show the PID of the processing listening TCP port 22: ![]() Itâs included in the psmisc package and preinstalled on many modern Linux distributions by default. The fuser utility displays which processes are using named files, sockets, or file systems. NOTE: On Linux Ubuntu systems, only the root user or the process owner can get/see the detailed information of the process. Once installed, This command will list all processes using TCP port number 80 on teh system: If it is not installed, run the command given below to install lsof: You can use the lsof (List of Open Files) command to listen all the open files on your Linux Ubuntu system. ![]() $ sudo netstat -ltnp | grep -w ':80' Using the lsof Command For example the following command will display which process is running on port number 80 on the system: Run the following command to find which process is running on specific port number. n: display addresses in a numerical formįind Which Process Is Running On A Specific Port Number.The netstat command uses the following command parameters to diplay the related netwrok information: Otherwise, the classic method of getting the process ID associated with port first and then killing it works as well.If the command is not installed upon the system, install it using the command $ sudo apt-get install net-tools and once installed use it to check port and process information. For example, if the process is using port 8080, you would use the following command: lsof -i :8080. The output of the fuser command will display a list of processes using TCP ports, along with their respective PIDs. Lets break down the options used in the command -n tcp tells fuser to only display TCP connections-v tells fuser to display more verbose output. To find the PID associated with a specific port, use the -i flag to specify the port number and the -t flag to only show the PIDs: lsof -i : -t. This command will display all processes using TCP ports 1 to 65535.With the fuser command, you don't need to know the process details. You can do this using the lsof command, which lists all the open files on the system. This article covered how to terminate a process running on a specific port. This will completely kill the particular process. For example, to kill the Apache process on Ubuntu, use the command: sudo systemctl stop apache2 In such cases, I advise you to use application specific commands to stop a service. Finding out which process is using a particular port can occasionally be necessary. Even if you use the killall command, they will still appear after some time. Identifying Processes using a Specific Port. If you know the port number and need to find out the process using it, you could use lsof command which is not. One thing to note here is that certain processes like mysqld and apache2 might restart after you have killed them using the above commands. The process 1124 is listening on port 12345. The classic way of killing processes using certain portsįor those who would rather not use fuser, lsof may be used to determine which processes are using a certain port and then use this information with the kill command.Īs an instance, to kill all the process running on TCP port 3306, use the below command to detect the process id: sudo lsof -i TCP:3306 f you donât have the netstat utility available, it might have been replaced with a newer toolkit. You can use the lsof command to verify that processes are no longer running on the target port. Similarly, use the fuser command to terminate a process on TCP port 3306: sudo fuser -k 3306/tcp Simply provide the port number and type (TCP or UDP) in the fuser command.įor instance, to end a process on UDP port 81, use the fuser command as: sudo fuser -k 81/udp The fuser command combined with the -k (kill) option will end all associated processes that are listening on a TCP or UDP port. Terminating processes based on their port numbers You can terminate a process based on the port number it is using. But in some cases, you may not know it or you just don't necessarily need to know it.įor example, if you want to kill the processes running on specific ports, you may not need to know the process ID or name at all. This works when you know the process ID or name. You can also use the process name with killall command. ![]() Killing a process in Linux usually involves using the process ID with the kill command.
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