1. CentOS 7에서는 IP 정보를 확인하는 ifconfig 명령어를 이용할 수 없습니다. 대신 ip addr show 명령어를 이용해야 합니다.
[root@controller ~]# ifconfig -bash: /usr/sbin/ifconfig: 그런 파일이나 디렉터리가 없습니다 [root@controller ~]# ip addr show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 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 pfifo_fast state UP qlen 1000 link/ether 08:00:27:52:3f:f5 brd ff:ff:ff:ff:ff:ff inet 192.168.56.101/24 brd 192.168.56.255 scope global dynamic enp0s8 valid_lft 1050sec preferred_lft 1050sec inet6 fe80::a00:27ff:fe52:3ff5/64 scope link valid_lft forever preferred_lft forever 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 08:00:27:3f:ad:71 brd ff:ff:ff:ff:ff:ff inet 192.168.0.43/24 brd 192.168.0.255 scope global dynamic eth1 valid_lft 4257sec preferred_lft 4257sec inet6 fe80::a00:27ff:fe3f:ad71/64 scope link valid_lft forever preferred_lft forever