netstat port code example

Example 1: netstat find port

netstat -na | find "8080"

Example 2: linux query port use by pid

$ sudo ss -lptn 'sport = :80'
State   Local Address:Port  Peer Address:Port              
LISTEN  127.0.0.1:80        *:*                users:(("nginx",pid=125004,fd=12))
LISTEN  ::1:80              :::*               users:(("nginx",pid=125004,fd=11))

Example 3: netstat check port

sudo netstat -plnt

Example 4: how to check listening ports on a server

$ sudo netstat -plnt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name
tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN      3686/mysqld
tcp        0      0 :::443                      :::*                        LISTEN      2218/httpd
tcp        0      0 :::80                       :::*                        LISTEN      2218/httpd
tcp        0      0 :::22                       :::*                        LISTEN      1051/sshd

Example 5: how to check listening ports on a server

sudo ss -tulwn | grep LISTEN

Example 6: netstat -anp | grep :80 | wc -l

netstat -ant | egrep '(:80|:443) .*:.*ESTABLISHED' | awk '{print $5}' | cut -d: -f1 | sort | uniq -c