If SIGTERM fails, try SIGHUP, which is stonger medicine: kill -HUP pid. Using kill by itself sends SIGTERM, which you should try first as it allows the program to properly clean up after itself. You might have to use your judgment as to which of the matches needs to be killed, or you could use top instead. Kill pid where pid is the Process ID of the program. The first field of each line of output is a number which represents the Process ID of the program matched by grep (you can safely ignore the last one, which represents grep itself.
This should return a line of output that looks something like this: $ ps ax | grep firefoxĢ222 ? S 0:00 /bin/sh /usr/lib/firefox-3.6.9/firefoxĢ231 ? Sl 514:36 /usr/lib/firefox-3.6.9/firefox-binģ0290 pts/2 S+ 0:00 grep -color=auto firefox Use the following command to fix port 4200 is already in use error.Open another terminal and run ps ax | grep foo where foo is the name of the unresponsive program. In Window operating system open command prompt.
To fix port 4200 is already in use error in In Mac & Linux OS (Ubuntu etc) use the following commands sudo kill $(sudo lsof -t -i:4200) Orįix Port 4200 is already in use.Use ‘-port’ to specify a different port error in Window Our angular application will be running on To kill already existing angular process use the below commands Fix Port 4200 is already in use.Use ‘-port’ to specify a different port error in Mac & Linux To change the port number for our angular application use the below command The minimum value is 0 and the maximum value is 65535.Īnd, within this range, ports 0 – 1023 are reserved for specific purposes(mostly). And our application URL will be To avoid this error we need to change the port number to other port which is free.Īccording to RFC 793 port numbers is a 16-bit unassigned integer. To close or terminate the angular instance always use Control+C (Ctrl+c)Īnd ng serve uses default port number 4200 to run the angular application. In this case, you need to kill the previous process
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