linux ip命令学习
ip命令可以用来查看ip地址，路由信息等。
sh-# ip address
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:00:00:00:fd:19 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.155/24 brd 192.168.0.255 scope global eth0
3: sit0: <NOARP> mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0
sh-#
sh-# ip route
default via 192.168.0.1 dev eth0
192.168.0.0/24 dev eth0 src 192.168.0.155
sh-#
使用ifconfig或route等命令也可以显示一些相关的网络信息，
sh-# ifconfig
eth0 Link encap:Ethernet HWaddr 00:00:00:00:FD:19
inet addr:192.168.0.155 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:201 errors:0 dropped:109 overruns:0 frame:0
TX packets:105 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:25732 (25.1 Kb) TX bytes:11247 (10.9 Kb)
Interrupt:40 Base address:0x2000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:15 errors:0 dropped:0 overruns:0 frame:0
TX packets:15 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:480 (480.0 b) TX bytes:480 (480.0 b)
sh-#
sh-# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
192.168.0.0 * 255.255.255.0 U 0 0 0 eth0
sh-#
ip命令也可以通过参数让其显示指定的信息，
sh-# ip -f inet route
default via 192.168.0.1 dev eth0
192.168.0.0/24 dev eth0 src 192.168.0.155
sh-#
sh-# ip -f inet6 route
unreachable default dev lo metric -1 error -101
sh-#
sh-# ip -f link route
default via 192.168.0.1 dev eth0
192.168.0.0/24 dev eth0 src 192.168.0.155
unreachable default dev lo metric -1 error -101
sh-#
sh-# ip -f inet address
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
inet 127.0.0.1/8 scope host lo
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
inet 192.168.0.155/24 brd 192.168.0.255 scope global eth0
sh-#
sh-# ip -f inet route
default via 192.168.0.1 dev eth0
192.168.0.0/24 dev eth0 src 192.168.0.155
sh-#
sh-# ip -f inet link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:00:00:00:fd:19 brd ff:ff:ff:ff:ff:ff
3: sit0: <NOARP> mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0
sh-#
