[root@localhost ~]# ifconfig
-bash: ifconfig: command not found
解决
[root@localhost ~]# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
然后再安装net-tools
[root@localhost ~]# yum -y install net-tools
[root@localhost ~]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.100.10 netmask 255.255.255.0 broadcast 192.168.100.255
inet6 fe80::184c:4758:517:5473 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:e8:8a:ca txqueuelen 1000 (Ethernet)
RX packets 795469 bytes 1131924517 (1.0 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 66128 bytes 6564575 (6.2 MiB)
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 (Local Loopback)
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