How to write a shell script to check port and kill it?











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I have a command to check the port and kill specific pid running on that port. But I want to modify it to,




  1. Check port is busy or available

  2. If the port is busy then kill the pid


How can I do this?



Code is given below.



sudo netstat -nlpt | grep 2020 | awk '{print $7}' | sed s+/.*++g | sort -u | xargs -i kill -kill {}





bash scripts







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  • 2




    save sed, awk and sort with: kill -kill $(sudo netstat -nlpt | grep -oPm1 '2020.*/K.*')
    – dessert
    Dec 6 at 7:05

















up vote
1
down vote

favorite
1












I have a command to check the port and kill specific pid running on that port. But I want to modify it to,




  1. Check port is busy or available

  2. If the port is busy then kill the pid


How can I do this?



Code is given below.



sudo netstat -nlpt | grep 2020 | awk '{print $7}' | sed s+/.*++g | sort -u | xargs -i kill -kill {}





bash scripts







share|improve this question


















  • 2




    save sed, awk and sort with: kill -kill $(sudo netstat -nlpt | grep -oPm1 '2020.*/K.*')
    – dessert
    Dec 6 at 7:05















up vote
1
down vote

favorite
1









up vote
1
down vote

favorite
1






1





I have a command to check the port and kill specific pid running on that port. But I want to modify it to,




  1. Check port is busy or available

  2. If the port is busy then kill the pid


How can I do this?



Code is given below.



sudo netstat -nlpt | grep 2020 | awk '{print $7}' | sed s+/.*++g | sort -u | xargs -i kill -kill {}





bash scripts







share|improve this question













I have a command to check the port and kill specific pid running on that port. But I want to modify it to,




  1. Check port is busy or available

  2. If the port is busy then kill the pid


How can I do this?



Code is given below.



sudo netstat -nlpt | grep 2020 | awk '{print $7}' | sed s+/.*++g | sort -u | xargs -i kill -kill {}





bash scripts




bash scripts






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Dec 6 at 4:40









Janith

647




647








  • 2




    save sed, awk and sort with: kill -kill $(sudo netstat -nlpt | grep -oPm1 '2020.*/K.*')
    – dessert
    Dec 6 at 7:05
















  • 2




    save sed, awk and sort with: kill -kill $(sudo netstat -nlpt | grep -oPm1 '2020.*/K.*')
    – dessert
    Dec 6 at 7:05










2




2




save sed, awk and sort with: kill -kill $(sudo netstat -nlpt | grep -oPm1 '2020.*/K.*')
– dessert
Dec 6 at 7:05






save sed, awk and sort with: kill -kill $(sudo netstat -nlpt | grep -oPm1 '2020.*/K.*')
– dessert
Dec 6 at 7:05












1 Answer
1






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up vote
4
down vote













You can make use of this command to delete port in Ubuntu.



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


The lsof command or list of open files with -i flag will find out all the running process of specific port and gives the corresponding process Id. The kill option will terminate the process with pid given from the lsof command.



So if you want to kill process running on port 3000, you will have to execute the following command



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





share|improve this answer





















  • But first I want to check the port hang by someone, and if it is true then kill it.
    – Janith
    Dec 7 at 6:12










  • Well , this will actually check all the process using the port initially and will kill all process attached to it
    – Sachu Shaji Abraham
    Dec 7 at 6:15











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

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active

oldest

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active

oldest

votes








up vote
4
down vote













You can make use of this command to delete port in Ubuntu.



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


The lsof command or list of open files with -i flag will find out all the running process of specific port and gives the corresponding process Id. The kill option will terminate the process with pid given from the lsof command.



So if you want to kill process running on port 3000, you will have to execute the following command



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





share|improve this answer





















  • But first I want to check the port hang by someone, and if it is true then kill it.
    – Janith
    Dec 7 at 6:12










  • Well , this will actually check all the process using the port initially and will kill all process attached to it
    – Sachu Shaji Abraham
    Dec 7 at 6:15















up vote
4
down vote













You can make use of this command to delete port in Ubuntu.



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


The lsof command or list of open files with -i flag will find out all the running process of specific port and gives the corresponding process Id. The kill option will terminate the process with pid given from the lsof command.



So if you want to kill process running on port 3000, you will have to execute the following command



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





share|improve this answer





















  • But first I want to check the port hang by someone, and if it is true then kill it.
    – Janith
    Dec 7 at 6:12










  • Well , this will actually check all the process using the port initially and will kill all process attached to it
    – Sachu Shaji Abraham
    Dec 7 at 6:15













up vote
4
down vote










up vote
4
down vote









You can make use of this command to delete port in Ubuntu.



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


The lsof command or list of open files with -i flag will find out all the running process of specific port and gives the corresponding process Id. The kill option will terminate the process with pid given from the lsof command.



So if you want to kill process running on port 3000, you will have to execute the following command



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





share|improve this answer












You can make use of this command to delete port in Ubuntu.



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


The lsof command or list of open files with -i flag will find out all the running process of specific port and gives the corresponding process Id. The kill option will terminate the process with pid given from the lsof command.



So if you want to kill process running on port 3000, you will have to execute the following command



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






share|improve this answer












share|improve this answer



share|improve this answer










answered Dec 6 at 8:01









Sachu Shaji Abraham

412




412












  • But first I want to check the port hang by someone, and if it is true then kill it.
    – Janith
    Dec 7 at 6:12










  • Well , this will actually check all the process using the port initially and will kill all process attached to it
    – Sachu Shaji Abraham
    Dec 7 at 6:15


















  • But first I want to check the port hang by someone, and if it is true then kill it.
    – Janith
    Dec 7 at 6:12










  • Well , this will actually check all the process using the port initially and will kill all process attached to it
    – Sachu Shaji Abraham
    Dec 7 at 6:15
















But first I want to check the port hang by someone, and if it is true then kill it.
– Janith
Dec 7 at 6:12




But first I want to check the port hang by someone, and if it is true then kill it.
– Janith
Dec 7 at 6:12












Well , this will actually check all the process using the port initially and will kill all process attached to it
– Sachu Shaji Abraham
Dec 7 at 6:15




Well , this will actually check all the process using the port initially and will kill all process attached to it
– Sachu Shaji Abraham
Dec 7 at 6:15


















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