LINUX--修改IP地址

A、修改ip地址
即時生效:
# ifconfig eth0 192.168.0.20 netmask 255.255.255.0
啓動生效:
修改/etc/sysconfig/network-scripts/ifcfg-eth0
B、修改default gateway
即時生效:
# route add default gw 192.168.0.254
啓動生效:
修改/etc/sysconfig/network-scripts/ifcfg-eth0
C、修改dns
修改/etc/resolv.conf
修改後可即時生效，啓動同樣有效
D、修改host name
即時生效:
# hostname fc2
啓動生效:
修改/etc/sysconfig/network