命令行更改linux网卡IP地址、网关、DNS

网卡eth0    IP修改为 102.168.0.1   
ifconfig eth0 102.168.0.1 netmask 255.255.255.0
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网关修改为 102.168.0.254
route add default gw 102.168.0.254
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修改dns
echo "nameserver 202.202.202.20 ">> /etc/resolv.conf
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重启网络服务
/etc/rc.d/init.d/network restrart
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挂载光驱
1.在 mnt 目录下建立一个 cdrom目录
cd /mnt
mkdir cdrom
2.挂载光驱
mount -t iso9660 /dev/cdrom /mnt/cdrom
3.卸载光驱
umount /mnt/cdrom
查看网关 ，IP命令：route , ifconfig -a