redhat linux中设置网卡固定ip
之前在xwindow下的redhat-config-network 设置网卡固定ip发现不起作用，设置好后就是ping不通。就查了些资料，更改 /etc/sysconfig/network-scripts/ifcfg-eth0(第一个网卡为eth0)，配置dns的文件为 /etc/resolv.conf，我保留了dhcp的配置，配置完后用ifconfig eth0 down;ifconfig eth0 up 就可以了。以下是配置文件的清单：
#/etc/sysconfig/network-scripts/ifcfg-eth0：
DEVICE=eth0
BOOTPROTO=static
BROADCAST=192.168.1.255
IPADDR=192.168.1.10
NETMASK=255.255.255.0
NETWORK=192.168.1.0
HWADDR=52:54:AB:2F:CF:F0
GATEWAY=192.168.1.1
ONBOOT=on
TYPE=Ethernet
BOOTPROTO=static
BROADCAST=192.168.1.255
IPADDR=192.168.1.10
NETMASK=255.255.255.0
NETWORK=192.168.1.0
HWADDR=52:54:AB:2F:CF:F0
GATEWAY=192.168.1.1
ONBOOT=on
TYPE=Ethernet
#/etc/resolv.conf
nameserver 202.109.14.5
nameserver 202.96.209.5
search localdomain
nameserver 202.96.209.5
search localdomain
或者使用命令:setup
或者：
route add -net 192.168.1.50 netmask 255.255.255.0 dev eth0
或：
ifconfig eth0 192.168.1.50 netmask 255.255.255.0
ubuntu 网卡设置,ip,mask,gateway,dns
sudo vi /etc/network/interfaces
//这个应该是决定是否启用这个端口
auto eth0
//静态设置IP
iface eth0 inet static
address 172.16.146.200
netmask 255.255.255.0
#broadcast 172.16.146.255
gateway 172.16.146.254
//通过dhcp动态设置
iface eth0 inet dhcp
//设置DNS服务器
sudo vi /etc/resolv.conf
nameserver 202.96.128.68
nameserver 61.144.56.101
nameserver 192.168.8.220
//重新设置网络，以启用新设置
sudo /etc/init.d/networking restart
//ok