View process Port under Ubuntu

# View all open ports and service names (note that the service name shown here is just the service name for the standard port and may not be accurate)
nmap localhost

# See which processes have opened the specified port (the daemon must be executed by the root user to see)
Lsof-i:port

# to see which processes have opened the specified ports port, and the last column is the process ID (this method has little effect on daemons)
Netstat-nap|grep Port

# View the system service name for the port number
cat/etc/services

# Start | stop | Restart system service
Sudo/etc/init.d/service Start|stop|restart

View process Port under Ubuntu