CentOS7网络调试

　　CentOS7网络调试
　　快捷键操作
查看系统的IP地址
增⼤终端字体: "ctrl" + "shfit" + "+"
减⼩终端字体: "ctrl" + "-"
第⼀种⽅式：
[root@hangzhouyunjisuan1802 ~]# ip a
1: lo:  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: ens33:  mtu 1500 qdisc pfifo_fast state
UP group default qlen 1000
link/ether 00:0c:29:88:93:09 brd ff:ff:ff:ff:ff:ff
inet 192.168.13.248/24 brd 192.168.13.255 scope global noprefixroute
dynamic ens33
valid_lft 1573sec preferred_lft 1573sec
inet6 fe80::5f0a:bf7f:7d7b:813f/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: virbr0:  mtu 1500 qdisc noqueue state
DOWN group default qlen 1000
link/ether 52:54:00:fc:21:fa brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic:  mtu 1500 qdisc pfifo_fast master
virbr0 state DOWN group default qlen 1000
link/ether 52:54:00:fc:21:fa brd ff:ff:ff:ff:ff:ff
[root@hangzhouyunjisuan1802 ~]#
第⼆种⽅式：
sshd连接
测试⽹络连通性
[root@hangzhouyunjisuan1802 ~]# ifconfig
ens33: flags=4163 mtu 1500
inet 192.168.13.248 netmask 255.255.255.0 broadcast
192.168.13.255
inet6 fe80::5f0a:bf7f:7d7b:813f prefixlen 64 scopeid 0x20
ether 00:0c:29:88:93:09 txqueuelen 1000 (Ethernet)
RX packets 279 bytes 29182 (28.4 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 314 bytes 29547 (28.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73 mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1000 (Local Loopback)
RX packets 32 bytes 2592 (2.5 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 32 bytes 2592 (2.5 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099 mtu 1500
inet 192.168.122.1 netmask 255.255.255.0 broadcast
192.168.122.255
ether 52:54:00:fc:21:fa txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@hangzhouyunjisuan1802 ~]#
[C:/]$ ssh root@
[root@localhost ~]# ping www.baidu.com //测试外部⽹络连通是否正常
[root@localhost ~]# clear //清空终端显示"ctrl+l"
//成功通信
[root@hangzhouyunjisuan1802 ~]# ping 10.31.165.37
PING 10.31.165.37 (10.31.165.37) 56(84) bytes of data.
64 bytes from 10.31.165.37: icmp_seq=1 ttl=128 time=0.357 ms
64 bytes from 10.31.165.37: icmp_seq=2 ttl=128 time=0.550 ms
64 bytes from 10.31.165.37: icmp_seq=3 ttl=128 time=0.801 ms
//失败通信
[root@hangzhouyunjisuan1802 ~]# ping 192.168.235.131
PING 192.168.235.131 (192.168.235.131) 56(84) bytes of data.
^C
--- 192.168.235.131 ping statistics ---
27 packets transmitted, 0 received, 100% packet loss, time 26020ms
[root@hangzhouyunjisuan1802 ~]#