linux（虚拟机）查看并修改ip地址、子网掩码、广播地址(断网问题解决)

一、查看

命令：ifconfig

结果如下

~$ ifconfig
eth0: flags=4163  mtu 1500
        inet 192.168.153.125  netmask 255.255.255.0  broadcast 192.168.153.255
        ether 00:0c:29:10:bb:2b  txqueuelen 1000  (以太网)
        RX packets 6916  bytes 2844196 (2.8 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 5034  bytes 936442 (936.4 KB)
        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  (本地环回)
        RX packets 374  bytes 27084 (27.0 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 374  bytes 27084 (27.0 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

其中inet 为ip，netmask为子网掩码，broadcast为 广播地址

二、修改

1.修改ip地址：sudo ifconfig eth0 192.168.153.126

注（重要）：修改完后会出现断网问题，用netstat -rn查看网关时发现网关丢失。解决办法：手动添加网关：sudo route add default gw 192.168.153.2

2.修改子网掩码：ifconfig eth0 192.168.120.56 netmask 255.255.255.0

注意：同上。

3.修改广播地址：ifconfig eth0 192.168.120.56 netmask 255.255.255.0 broadcast 192.168.120.255

注意：同上。

   

转载于:https://www.cnblogs.com/rioo/p/7390028.html