[Linux](EN) Find process id of process using specific port with netstat

Find process id of process using specific port with netstat

Environment and Prerequisite

• Ubuntu
• CentOS
• netstat(8)

Find process id of process using specific port with netstat

netstat

netstat -nltup | grep [port_number]

Usage

twpower@twpower-private-server:~$ netstat -nltup | grep 8888
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 127.0.0.1:8888          0.0.0.0:*               LISTEN      622522/python3.9

netstat and option

netstat

• Print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships

NETSTAT(8)               Linux System Administrator's Manual              NETSTAT(8)

NAME
       netstat  -  Print  network connections, routing tables, interface statistics, masquerade connections, and multicast memberships

Used Options

• n: Show numeric IP address not hostname.
• l: Show LISTEN state of network connections and unix sockets.
• t: Show TCP protocol datas.
• u: Show UDP protocol datas.
• p: Show process id and name.

Reference

• https://linux.die.net/man/8/netstat
• https://www.linode.com/docs/guides/inspecting-network-information-with-netstat/