Ubuntu24.04でIPアドレスを確認する方法

作成日 2024.05.29
ubuntu

Ubuntu24.04でIPアドレスを確認する方法を記述してます。複数ありますが、自分は「ip a」をよく使用します。

1. 環境
2. IPアドレスを確認

環境

OS Ubuntu24.04

IPアドレスを確認

まずは、「ip a」コマンドで確認できます。すべてのnicを確認できます。

$ ip a

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 noprefixroute 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:15:5d:01:33:01 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.43/24 brd 192.168.1.255 scope global dynamic noprefixroute eth0
       valid_lft 511165sec preferred_lft 511165sec
    inet6 fe80::215:5dff:fe01:3301/64 scope link 
       valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:e1:f5:a9:8b brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever

「hostname -I」だとシンプルに確認できます。

$ hostname -I
192.168.1.43 172.17.0.1

「nmcli device show」だと、整列して綺麗に見えます

$ nmcli device show

GENERAL.DEVICE:                         eth0
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         00:15:5D:01:33:01
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     netplan-eth0
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/2
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         192.168.1.43/24
IP4.GATEWAY:                            192.168.1.1
IP4.ROUTE[1]:                           dst = 192.168.1.0/24, nh = 0.0.0.0, mt = 100
IP4.ROUTE[2]:                           dst = 0.0.0.0/0, nh = 192.168.1.1, mt = 100
IP4.DNS[1]:                             192.168.1.1
IP6.ADDRESS[1]:                         fe80::215:5dff:fe01:3301/64
IP6.GATEWAY:                            --
IP6.ROUTE[1]:                           dst = fe80::/64, nh = ::, mt = 256

GENERAL.DEVICE:                         lo
GENERAL.TYPE:                           loopback
GENERAL.HWADDR:                         00:00:00:00:00:00
GENERAL.MTU:                            65536
GENERAL.STATE:                          100 (connected (externally))
GENERAL.CONNECTION:                     lo
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/1
IP4.ADDRESS[1]:                         127.0.0.1/8
IP4.GATEWAY:                            --
IP6.ADDRESS[1]:                         ::1/128
IP6.GATEWAY:                            --

GENERAL.DEVICE:                         docker0
GENERAL.TYPE:                           bridge
GENERAL.HWADDR:                         02:42:E1:F5:A9:8B
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected (externally))
GENERAL.CONNECTION:                     docker0
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/3
IP4.ADDRESS[1]:                         172.17.0.1/16
IP4.GATEWAY:                            --
IP4.ROUTE[1]:                           dst = 172.17.0.0/16, nh = 0.0.0.0, mt = 0
IP6.GATEWAY:                            --

「networkctl status」でも確認可能です。

$ networkctl status
systemd-networkd is not running, output might be incomplete.
● Interfaces: n/a
       State: n/a
Online state: unknown
     Address: 192.168.1.43 on eth0
              172.17.0.1 on docker0
              fe80::215:5dff:fe01:3301 on eth0
     Gateway: 192.168.1.1 on eth0