Reputation: 78254

How to kill a process on a port on ubuntu

I am trying to kill a process in the command line for a specific port in ubuntu.

If I run this command I get the port:

sudo lsof -t -i:9001

so...now I want to run:

sudo kill 'sudo lsof -t -i:9001'

I get this error message:

ERROR: garbage process ID "lsof -t -i:9001".
Usage:
  kill pid ...              Send SIGTERM to every process listed.
  kill signal pid ...       Send a signal to every process listed.
  kill -s signal pid ...    Send a signal to every process listed.
  kill -l                   List all signal names.
  kill -L                   List all signal names in a nice table.
  kill -l signal            Convert between signal numbers and names.

I tried sudo kill 'lsof -t -i:9001' as well

Upvotes: 906

Answers (30)

Arnold Ighiwiyisi

Reputation: 150

On my ubuntu-22.04 machine, this worked to kill port 8000:

fuser -k 8000/tcp

Upvotes: 6

Salma Aboumzrag

Reputation: 27

sudo netstat -lpn |grep :8080

then get the PID of this process

kill -9 <the PID>

Upvotes: 3

knaitas

Reputation: 51

Just add an alias to your .bashrc / .zshrc:

Open new terminal
nano .bashrc
scroll down and add an alias: alias kp='kill_process_by_port() { sudo kill -9 $(sudo lsof -t -i:"$1"); }; kill_process_by_port "$@"'
ctrl + x +y
source .bashrc
kp 9000

Upvotes: 5

ANOOP NAYAK

Reputation: 552

Lets consider If you want to kill a port 3000.

Step 1: Run this command, which will give u its PID.

sudo lsof -t -i:3000

This returned me PID as 291141

Step 2: Run this command to kill the port using PID.

sudo kill -9 291141

Boom!!! Port killed

Upvotes: 22

Towfiqul Islam

Reputation: 496

killport <port>

Add this code in your CLI and use this alias.

killport () {
  PID=$(sudo lsof -t -i:$1)
  sudo kill -9 ${PID}
}

Upvotes: 23

Avi

Reputation: 11

You can also use xargs. Just run the following,

sudo lsof -t -i:443 | xargs sudo kill -9

Upvotes: 1

zellio

Reputation: 32484

You want to use backtick, not regular tick:

sudo kill -9 `sudo lsof -t -i:9001`

If that doesn't work, you could also use $() for command interpolation:

sudo kill -9 $(sudo lsof -t -i:9001)

Upvotes: 1838

PHP Hupp Technologies

Reputation: 1952

sudo kill -9 $(sudo lsof -t -i:9001) worked for me or you can use

sudo kill -9 `sudo lsof -t -i:9001`

replace 9001 with port number you want.

Upvotes: 14

Nishant Kumar

Reputation: 945

Just enter the following command in the terminal

kill -9 $(lsof -t -i:3000)

Upvotes: 11

Naveen Kumar

Reputation: 1067

you can use following command in terminal
fuser -k 3000/tcp

Upvotes: 6

Vishnu S Babu

Reputation: 1640

The best way to kill a port in the Ubuntu terminal is with the fuser command; e.g.:

fuser -k 9001/tcp

This sends SIGKILL by default.

Upvotes: 125

shekhar677

Reputation: 89

get PID of process running on port 3000:

lsof -i tcp:3000
kill th process

kill -9 process_id

Example:
lsof -i tcp:3000
(PID in output = 5805)
kill -9 5805

use sudo if required

Upvotes: 2

Mohit Singh

Reputation: 6167

FOR UBUNTU 1- Find what application/process is using the pro, type:

sudo netstat -lpn |grep :8080

and press Enter.

You will get an output similar to this one

tcp6       0      0 :::8080                 :::*                    LISTEN      6782/java

2- I have got the process Id, which is 6782, now this is the process that is using port 8080.

3- Kill the process, type: kill -p 6782

kill -9 6782

Upvotes: 166

Francisco Cardoso

Reputation: 1968

When using newer versions of Ubuntu you won't have netcat anymore, instead you use ss

ss -lptpn | grep 9001   
sudo kill <replace-with-process-id>

Upvotes: 2

Vadim

Reputation: 170

xargs can be a very useful command.

You can pipe commands like this

lsof -t -i :9001 | xargs sudo kill

What it does: it takes the output from the first command, in this case the process running on port, and will pass it to sudo kill.

Upvotes: 2

Loveli

Reputation: 51

If I was you,I would use

fuser -k -n tcp PORT
kill -9 PID

Upvotes: 5

Ransaka Ravihara

Reputation: 1994

It gives me an error OSError: [Errno 98] Address already in use. using the following method solved my error in Ubuntu.(VERSION="18.04.4 LTS (Bionic Beaver)")

$ sudo netstat -lpn |grep :5000
tcp        0      0 0.0.0.0:5000            0.0.0.0:*               LISTEN      25959/uwsgi   

$ fuser -k -n tcp 5000
5000/tcp:            25959

Hope it will help someone!

Upvotes: 3

Prakash Nagaraj

Reputation: 561

To kill the process based on port first we have to find out the relevant pid for given port and kill using that pid,

In my case i wanted to get the pid(process id) of 3000 port:

netstat -ltnp | grep -w '3000'

then find pid which is listening to tcp

tcp6       0      0 :::3000                 :::*                    LISTEN      29972/node

you will get pid 29972

To kill this pid use below command

kill -9 29972

pseudo code for kill process based on port

 netstat -ltnp | grep -w 'PORT'

and

kill -9 PID

Upvotes: 15

Arayan Singh

Reputation: 3350

To kill a process running on Port number 9001

sudo kill -9 $(sudo lsof -t -i:9001)


lsof   - list of files(Also used for to list related processes)

-t     - show only process ID

-i     - show only internet connections related process

:9001  - show only processes in this port number

kill   - command to kill the process

-9     - forcefully

sudo   - command to ask admin privilege(user id and password).

for more you can visit my blog

Upvotes: 40

Lalit Mohan

Reputation: 3295

Displays active TCP connections, ports on which the computer is listening.

netstat -tupln

It will list you all the connection along pid. Find and copy the pid and run the following command. Make sure you replace the with actual id in the following command.

kill -9 <copied pid>

-9 use to forcefully kill the connection.

Upvotes: 1

Professor

Reputation: 2154

you can work this using node

npm install freethenport -g

then

node freethenport 9001

Upvotes: 1

Ratnesh Kushwaha

Reputation: 368

Its two steps process:

Know process id on port no. 8080 (can be any)

Kill process of that id 8689 (can be different)

fuser -n tcp 8080

#o/p 8080/tcp    8689

kill -9 8689

Upvotes: 1

kumbhani bhavesh

Reputation: 2257

Use the command

 netstat -plten |grep java

used grep java as tomcat uses java as their processes.

It will show the list of processes with port number and process id

tcp6       0      0 :::8080                 :::*                    LISTEN      
1000       30070621    16085/java

the number before /java is a process id. Now use kill command to kill the process

kill -9 16085

-9 implies the process will be killed forcefully.

Upvotes: 5

Ranvijay sachan

Reputation: 2444

Try this:

lsof -i :port

or 

sudo kill $(sudo lsof -t -i:8000)

or

kill -9 <pid>

or 

sh killport 8000

Upvotes: 4

Guna Sekaran

Reputation: 563

Kill PORT:

sudo is important to show process id.

$ sudo netstat -antlp | grep 45136
tcp      0      0 0.0.0.0:45136         0.0.0.0:*        LISTEN           **-** 

$ kill -9 45136

Upvotes: 5

Abdennour TOUMI

Reputation: 93203

Use killport command :

sh killport 9001

To Download shell ,you can use wget :

wget https://cdn.rawgit.com/abdennour/miscs.sh/e0aac343/killport

Upvotes: 24

davidblumer

Reputation: 103

sudo kill `sudo lsof -t -i:9001`

you don't have to add the -9signal option

Upvotes: 3

delpha

Reputation: 970

Use this:

sudo kill -9 $(lsof -t -i:9001)

Upvotes: 14

User16119012

Reputation: 957

There are some process which does not shown using normal netstat command, so you have to check it using sudo.

Do sudo netstat -lpn |grep :8080. Process running by system does not show PID, to get PID of this process you will have to run it using sudo

And then killl the process using port 8080. You may have to use sudo here as well. So to kill this process use sudo kill -9 PID

Upvotes: 37

putra.koreng

Reputation: 4335

you can use

fuser -n tcp -k 9001

see more details in wikipedia

Upvotes: 431

How to kill a process on a port on ubuntu

Answers (30)

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