Operation Manual

the number of clean and dirty memory pages the process with the ID PID is using at
that time. It differentiates between shared and private memory, so you are able to see
how much memory the process is using without including memory shared with other
processes.
13.5 Networking
13.5.1 Show the Network Status: netstat
netstat shows network connections, routing tables (-r), interfaces (-i), masquerade
connections (-M), multicast memberships (-g), and statistics (-s).
tux@mercury:~> netstat -r
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.2.0 * 255.255.254.0 U 0 0 0 eth0
link-local * 255.255.0.0 U 0 0 0 eth0
loopback * 255.0.0.0 U 0 0 0 lo
default 192.168.2.254 0.0.0.0 UG 0 0 0 eth0
tux@mercury:~> netstat -i
Kernel Interface table
Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg
eth0 1500 0 1624507 129056 0 0 7055 0 0 0 BMNRU
lo 16436 0 23728 0 0 0 23728 0 0 0 LRU
When displaying network connections or statistics, you can specify the socket type to
display: TCP (-t), UDP (-u), or raw (-r). The -p option shows the PID and name
of the program to which each socket belongs.
The following example lists all TCP connections and the programs using these connec-
tions.
mercury:~ # netstat -t -p
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Pro
[...]
tcp 0 0 mercury:33513 www.novell.com:www-http ESTABLISHED 6862/fi
tcp 0 352 mercury:ssh mercury2.:trc-netpoll ESTABLISHED
19422/s
tcp 0 0 localhost:ssh localhost:17828 ESTABLISHED -
In the following, statistics for the TCP protocol are displayed:
194 Reference