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How to check if port is in use on Linux or Unix - nixCraft
<code class="language-bash">sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTEN
sudo lsof -i:22 ## see a specific port such as 22 ##
sudo nmap -sTU -O IP-address-Here</code>
linux  bash  sysadmin  networking  solution 
october 2019 by kme
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