cmd:netstat 

Usage 

netstat -a | grep -E 'ftp|\.80  '
# ftp connection
netstat -a | grep ftp
# http connection
netstat -a | grep '\.80  '
$ netstat --tcp -p
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Addr    Foreign Address State       PID/Program name
tcp        0      0 lab1-22.f:ssh lab1-18.fo:1044 ESTABLISHED -
tcp        0    224 lab1-22.f:ssh lab1-18.fo:1045 ESTABLISHED -
tcp        0      0 lab1-22.f:ssh lab1-18.fo:1031 ESTABLISHED -
tcp        0      0 lab1-22.f:ssh lab1-18.fo:1036 ESTABLISHED -
tcp        0      0 lab1-22.f:ssh lab1-18.fo:1032 ESTABLISHED -
tcp        0      0 lab1-22.f:ssh lab1-18.fo:1034 ESTABLISHED -
tcp        0      0 lab1-22.f:ssh lab1-18.fo:1035 ESTABLISHED -