# ifconfig -a
# ethtool eth0
# ifconfig eth0 inet 172.16.1.X/24
# route add default gw 172.16.1.50

# ip addr show dev eth0
# ip addr add 172.16.1.100+X/32 dev eth0
# ip addr del 172.16.1.100+X/32 dev eth0

...
# PCI device 0x1022:0x2000 (pcnet32)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:18:7f:01", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
...

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
        address 172.16.1.X
        netmask 255.255.255.0
        gateway 172.16.1.254

# Alias example
# auto eth0:0
# iface eth0:0 inet static
#         address 192.168.32.25
#         netmask 255.255.255.0

# 802.1q example
# auto vlan10
# iface vlan10 inet static
#        address 192.168.32.141
#        netmask 255.255.255.0
#        mtu 1500
#        vlan_raw_device eth0

hostX.class.un

127.0.0.1       localhost

172.16.1.X      hostX.class.un hostX
172.16.1.50     gate

 
domain class.un
nameserver 172.16.1.50

root@gate:~# /etc/init.d/networking restart

root@gate:~# hostname hostX.class.un

# mii-tool 

# ethtool eth0

# netstat -apn

# netstat -apn --tcp