linux网络检测命令
1. ifconfig
检查当前环境配置的IP信息
docker0 Link encap:Ethernet HWaddr 02:42:68:e5:5b:76
inet addr:172.17.0.1 Bcast:172.17.255.255 Mask:255.255.0.0
inet6 addr: fe80::42:68ff:fee5:5b76/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:23923 errors:0 dropped:0 overruns:0 frame:0
TX packets:24530 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:62249362 (59.3 MiB) TX bytes:5538367 (5.2 MiB)
eth0 Link encap:Ethernet HWaddr 76:8a:29:de:ed:ae
inet addr:192.168.8.100 Bcast:192.168.8.255 Mask:255.255.255.0
inet6 addr: fe80::748a:29ff:fede:edae/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1136217 errors:0 dropped:81 overruns:0 frame:0
TX packets:1092002 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:333483215 (318.0 MiB) TX bytes:244400646 (233.0 MiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:1088617 errors:0 dropped:0 overruns:0 frame:0
TX packets:1088617 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:457161134 (435.9 MiB) TX bytes:457161134 (435.9 MiB)
2. ip address
查看本地IP地址的
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 76:8a:29:de:ed:ae brd ff:ff:ff:ff:ff:ff
inet 192.168.8.100/24 brd 192.168.8.255 scope global dynamic eth0
valid_lft 54033sec preferred_lft 54033sec
inet6 fe80::748a:29ff:fede:edae/64 scope link
valid_lft forever preferred_lft forever
- lo 全称loopback，是回环地址，经常被分配到127.0.0.1地址上，用于本机通信，经过内核处理后直接返回，不会在任何网络中出现。
- eth0：网卡名，如果有多块网卡，会有多个eth 或其它名称。
- ink/ether：这个是MAC地址，唯一的，一块网卡一个MAC。
- inet：网卡上绑定的IP地址，通常所说的IPV4，一块网卡可以绑定多个IP地址。
在绑定IP地址时注意：windows主机会提示IP地址冲突，而linux主机无任何提示，在添加新的IP地址时务必检测一下新地址是否和原有地址冲突，避免造成访问不可用。常用检测命令：ping或arping IP； - inet6：IPV6地址，暂时没有，预留。
3. ip route
列出路由
ip route list
ip route show
ip route
192.168.8.0/24 dev eth0 proto kernel scope link src 192.168.8.100
192.168.8.1 dev eth0 proto dhcp scope link src 192.168.8.100 metric 1024
4. route -n
列出路由表
route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.8.1 0.0.0.0 UG 1024 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 vethe7978b8
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 veth19c8f37
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 veth1ee6089
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 veth4510020
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 vethb448582
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
172.18.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-12ec3d5b4075
192.168.8.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
192.168.8.1 0.0.0.0 255.255.255.255 UH 1024 0 0 eth0
5. dns配置
cat /etc/resolv.con
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