Linux

Check port with lsof command

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When you need to install a new packet (e.g: Jira, Jenkins, apache2, etc) . You should check ports is available or not. The below I will show you the way to check port with lsof command

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sudo lsof -i :8081
COMMAND   PID    USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
java    26105 jenkins  146u  IPv6  51016      0t0  TCP *:tproxy (LISTEN)

In Ubuntu, you and install LSOF with command:

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sudo apt-get install lsof

 

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Nguyen Sy Thanh Son

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