ip コマンドで ifconfig/ifdown/ifup 相当のことをするための覚書
概要
ip コマンドの使い方を毎回忘れるので覚書
ifconfig
$ ifconfig enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.0.103 netmask 255.255.255.0 broadcast 192.168.0.255 inet6 fe80::8993:6c4d:1cb:6e8d prefixlen 64 scopeid 0x20<link> ether 08:00:27:dc:d8:e3 txqueuelen 1000 (Ethernet) RX packets 1696 bytes 210497 (205.5 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 822 bytes 90988 (88.8 KiB) 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 32 bytes 2592 (2.5 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 32 bytes 2592 (2.5 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 ... $ ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 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 group default qlen 1000 link/ether 08:00:27:dc:d8:e3 brd ff:ff:ff:ff:ff:ff inet 192.168.0.103/24 brd 192.168.0.255 scope global noprefixroute dynamic enp0s3 valid_lft 162574sec preferred_lft 162574sec inet6 fe80::8993:6c4d:1cb:6e8d/64 scope link noprefixroute valid_lft forever preferred_lft forever ...
ifconfig で特定のデバイスの情報を表示する場合
$ ifconfig enp0s3 enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.0.103 netmask 255.255.255.0 broadcast 192.168.0.255 inet6 fe80::8993:6c4d:1cb:6e8d prefixlen 64 scopeid 0x20<link> ether 08:00:27:dc:d8:e3 txqueuelen 1000 (Ethernet) RX packets 1825 bytes 221661 (216.4 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 887 bytes 103090 (100.6 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 $ ip addr show enp0s3 2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 08:00:27:dc:d8:e3 brd ff:ff:ff:ff:ff:ff inet 192.168.0.103/24 brd 192.168.0.255 scope global noprefixroute dynamic enp0s3 valid_lft 162454sec preferred_lft 162454sec inet6 fe80::8993:6c4d:1cb:6e8d/64 scope link noprefixroute valid_lft forever preferred_lft forever
ifdown
$ sudo ifdown enp0s3 $ sudo ip link set enp0s3 down
ifup
$ sudo ifup enp0s3 $ sudo ip link set enp0s3 up
[おまけ] NIC の状態を確認する
$ ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 link/ether 08:00:27:dc:d8:e3 brd ff:ff:ff:ff:ff:ff ...