netstat displays the contents of various network-related data structures in depending on the options selected.
Syntax :
netstat <option/s>
multiple options can be given at one time.
Options
-a - displays the state of all sockets.
-r - shows the system routing tables
-i - gives statistics on a per-interface basis.
-m - displays information from the network memory buffers. On Solaris, this shows statistics
forSTREAMS
-p [proto] - retrieves statistics for the specified protocol
-s - shows per-protocol statistics. (some implementations allow -ss to remove fileds with a value of 0 (zero) from the display.)
-D - display the status of DHCP configured interfaces.
-n do not lookup hostnames, display only IP addresses.
-d (with -i) displays dropped packets per interface.
-I [interface] retrieve information about only the specified interface.
-v be verbose
interval - number for continuous display of statictics.
Example :
$netstat -rn
Routing Table: IPv4
Destination Gateway Flags Ref Use Interface
-------------------- -------------------- ----- ----- ------ ---------
192.168.1.0 192.168.1.11 U 1 1444 le0
224.0.0.0 192.168.1.11 U 1 0 le0
default 192.168.1.1 UG 1 68276
127.0.0.1 127.0.0.1 UH 1 10497 lo0
This shows the output on a Solaris machine who's IP address is 192.168.1.11 with a default router at 192.168.1.1
