1. CentOS 7을 설치하고 ifconfig 명령어를 실행하면 다음과 같이 command not found 명령어를 찾을 수 없다는 메시지가 표시됩니다. CentOS 7에서는 이전 버전과 다르게 ifconfig 명령어를 이용할 수 없습니다. 그래서 ip addr이나 ip addr show 명령어를 이용해 IP 정보를 확인해야 합니다.
[root@centos ~]$ ifconfig -bash: ifconfig: command not found [root@centos ~]$ ip addr 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: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 08:00:27:31:fb:8d brd ff:ff:ff:ff:ff:ff 3: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 08:00:27:a1:ec:77 brd ff:ff:ff:ff:ff:ff 4: enp0s9: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 08:00:27:46:b0:21 brd ff:ff:ff:ff:ff:ff inet 10.0.4.15/24 brd 10.0.4.255 scope global dynamic enp0s9 valid_lft 3320sec preferred_lft 3320sec inet6 fe80::a00:27ff:fe31:fb8d/64 scope link valid_lft forever preferred_lft forever