1)修改ip地址 即时生效: # ifconfig eth0 192.168.0.20 netmask 255.255.255.0
启动生效: 修改/etc/sysconfig/network-scripts/ifcfg-eth0
2)修改default gateway 即时生效: # route add default gw 192.168.0.254
启动生效: 修改/etc/sysconfig/network-scripts/ifcfg-eth0
3)修改dns 修改/etc/resolv.conf 修改后可即时生效，启动同样有效
4)修改host name 即时生效: # hostname fc2
启动生效: 修改/etc/sysconfig/network.
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