You can try netstat
netstat -vanp tcp | grep 3000
For macOS El Capitan and newer (or if your netstat doesn’t support -p), use lsof
lsof -i tcp:3000
For Centos 7 use:
netstat -vanp –tcp | grep 3000
Find:
sudo lsof -i :3000
Kill:
kill -9
by James Palmer
You can try netstat
netstat -vanp tcp | grep 3000
For macOS El Capitan and newer (or if your netstat doesn’t support -p), use lsof
lsof -i tcp:3000
For Centos 7 use:
netstat -vanp –tcp | grep 3000
Find:
sudo lsof -i :3000
Kill:
kill -9