虚拟机无法ping通主机ip，看了网上的一些教程，重置了虚拟网络编辑器，但是还是连不上，虚拟机上查看网络IP如下：
a@ubuntu:~$ ifconfig lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1000 (本地环回) RX packets 289 bytes 21301 (21.3 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 289 bytes 21301 (21.3 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
那就是没有获取ip，所以从网上看到dhclient -v命令获取ip，使用后结果如下：
root@ubuntu:~# ifconfig ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.32.128 netmask 255.255.255.0 broadcast 192.168.32.255 inet6 fe80::20c:29ff:fe4d:81bc prefixlen 64 scopeid 0x20<link> ether 00:0c:29:4d:81:bc txqueuelen 1000 (以太网) RX packets 615 bytes 742729 (742.7 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 323 bytes 34986 (34.9 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1000 (本地环回) RX packets 2505 bytes 191141 (191.1 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 2505 bytes 191141 (191.1 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
dhclient命令的作用是：使用动态主机配置协议动态的配置网络接口的网络参数，也支持BOOTP协议。
虽然对该命令不是非常了解，但是完美解决了我的问题。