Answers for "linux check if port is free"

2

free port in linux

netstat -tulnap        // list all ports and processes
netstat -anp|grep "port_number"     // show port details
sudo fuser -k Port_Number/tcp       // free the port needed
# or
lsof -n -i :'port-number' | grep LISTEN  // get port details
# sample  response:  java   4744 (PID)  test  364u  IP0 asdasdasda   0t0  TCP *:port-number (LISTEN)
kill -9 PID  // free port
Posted by: Guest on June-30-2020
1

linux test port

# Nice and verbose! From the man pages.
# Single port:
nc -zv 127.0.0.1 80

# Multiple ports:
nc -zv 127.0.0.1 22 80 8080

# Range of ports:
nc -zv 127.0.0.1 20-30
Posted by: Guest on February-04-2022

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