How To Detect Together With Kill A Procedure Listening On A Port Inwards Linux? Netstat Together With Lsof Ascendance Examples

In Linux, many times, you lot desire to find out the PID of a procedure which is listening on a port e.g. if multiple tomcat servers are running on a host together with you lot stimulate got to kill that process, but inward enterprise to kill that procedure you lot request the procedure id, how produce you lot notice the PID of the tomcat listening on port 8080? There are many Linux commands to notice the procedure using a specific port, but I'll part what I use. I ever utilisation the netstat ascendance amongst -p option, which displays procedure id of the procedure listening on a port. Btw, netstat is non the exclusively ascendance to find all processes using a detail port, you lot tin likewise utilisation the lsof command for the same purpose.

If you lot remember, nosotros stimulate got used lsof before to notice all the processes accessing a file but it tin likewise survive used to notice all processes accessing a specific port.

You volition encounter the instance of both netstat and lsof commands inward this article to notice the PID of procedure listening on a specific port inward Linux.

On the related note, it's real of import for a Java developer to larn nearly the Linux operating arrangement together with commands. The to a greater extent than you lot know nearly the Linux Operating arrangement together with dissimilar trounce e.g. bash, csh or ksh, the ameliorate you lot tin back upward your Java application.

That's why it's of import to bring together a class like Linux Command Line Basics, which provides an fantabulous introduction of essential trounce commands inward Linux. It volition non exclusively help you lot to larn nearly cardinal of Linux OS but likewise all of import commands you lot request to travel efficiently inward Linux.

Netstat ascendance to notice the PID of procedure listening on a port

So to notice the PID of your Java server listening on port 8080, you lot tin utilisation the next Linux command:

$ netstat -nap | grep 8080 (Not all processes could survive identified, non-owned procedure information volition non survive shown, you lot would stimulate got to survive root to encounter it all.) tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN 25414/java

hither you lot go, 25414 is the PID  or procedure id of your tomcat server. Since tomcat is a Java spider web application it started amongst java ascendance together with that's why you lot encounter 25414/java.

Remember, if you lot are non logged inward equally root or the user nether which your server is running, you lot mightiness encounter next error:

No information could survive read for "-p": geteuid()=XXX but you lot should survive root

If you lot encounter this error, thence merely sudo equally the user which is running the tomcat. If you lot know how Linux works, then you lot tin solve this mistake pretty speedily but if you lot don't thence you lot volition stimulate got a difficult time.

lsof ascendance instance to notice the processes using a specific port

Here is the instance of the lsof command to listing the procedure listening on a port.

$ lsof -i :8080 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME coffee 25414 appuser 44u IPv4 3733348 TCP *:XXX (LISTEN)

merely cry upward to -i option together with colon (:) before the port like: 8080.

Btw, if you lot don't notice the lsof command inward your PATH, search inward /usr/sbin, to a greater extent than frequently /usr/sbin is non added into user's PATH. In that you lot tin run the ascendance equally shown below:

$ /usr/sbin/lsof -i :8080 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME coffee 25414 appuser 44u IPv4 3733348 TCP *:XXX (LISTEN)

It volition display the same result.

Btw, if you lot similar the lsof ascendance together with interested inward learning its other application, you lot should banking concern jibe my postal service 10 ways to utilisation the lsof ascendance inward Linux. You tin likewise accept a hold back at below diagram past times Julia Evans which effectively summarise the diverse options of lsof ascendance inward Linux:

Summary

Here is the summary of how to notice the procedure listening on a detail port inward UNIX:

grep, fifty-fifty if you lot merely hand PID it volition fetch the trouble from netstat output thence I tin acquire the port on which a detail procedure is listening. Anyway, I volition demonstrate you lot a yoke of to a greater extent than tricks to notice the port on which a detail port is listening inward adjacent tutorial.

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Thanks for reading this article thence far. If you lot similar this Linux tutorial together with notice the information useful delight part amongst your friends together with colleagues. If you lot stimulate got whatever questions or feedback thence delight drib a note.

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