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1.ifconfig -a 和 cat /etc/resolv.conf （主要查看ip/netmask和dns）
2.netstat -rn
3.cat /etc/sysconfig/network
4.cat /etc/sysconfig/network-scripts/ifcfg-eth0
5.traceroute 第一行就是自己的网关
6.ip route show
7.route -n
以上几个是比较常用的查询网关的命令。下面是范例：
[[email protected]]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
184.82.152.96 0.0.0.0 255.255.255.248 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 184.82.152.97 0.0.0.0 UG 0 0 0 eth0
[[email protected]]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
# Intel Corporation 82567V-2 Gigabit Network Connection
DEVICE=eth0
BOOTPROTO=none
HWADDR=00:1c:c0:f8:a1:ac
ONBOOT=yes
NETMASK=255.255.255.248
IPADDR=184.82.152.98
GATEWAY=184.82.152.97
TYPE=Ethernet
[[email protected]]# ip route show
184.82.152.96/29 dev eth0 proto kernel scope link src 184.82.152.98
169.254.0.0/16 dev eth0 scope link
default via 184.82.152.97 dev eth0
[[email protected]]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
184.82.152.96 0.0.0.0 255.255.255.248 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 184.82.152.97 0.0.0.0 UG 0 0 0 eth0
[[email protected]]# ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:1C:C0:F8:A1:AC
inet addr:184.82.152.98 Bcast:184.82.152.103 Mask:255.255.255.248
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