How to check linux port

Sometimes we need to know the occupancy of a certain port in the system in order to relieve the program from occupying the port. So how to check the port status in the Linux system?

How to check the linux port

1. lsof -i:Port number is used to check the occupation of a certain port situation, such as checking the usage of port 8000, lsof -i:8000

# lsof -i:8000COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME lwfs 22065 root 6u IPv4 4395053 0t0 TCP *:irdmi (LISTEN)

2, netstat -tunlp |grep port number, used to check the process status of the specified port number, such as checking the status of port 8000, netstat -tunlp |grep 8000

# netstat -tunlp Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 4814/rpcbind tcp 0 0 0.0.0.0:5908 0.0.0.0:* LISTEN 25492/qemu-kvm tcp 0 0 0.0.0.0:6996 0.0.0.0:* LISTEN 22065/lwfs tcp 0 0 192.168.122.1:53 0.0.0.0:* LISTEN 38296/dnsmasq tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 5278/sshd tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 5013/cupsd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 5962/master tcp 0 0 0.0.0.0:8666 0.0.0.0:* LISTEN 44868/lwfs tcp 0 0 0.0.0.0:8000 0.0.0.0:* LISTEN 22065/lwfs

# netstat -tunlp | grep 8000 tcp 0 0 0.0.0.0:8000 0.0.0.0:* LISTEN 22065/lwfs

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