130 lines
4.7 KiB
Markdown
130 lines
4.7 KiB
Markdown
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# Get network interface information
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```shell
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ip a
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```
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```
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1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
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link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
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inet 127.0.0.1/8 scope host lo
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valid_lft forever preferred_lft forever
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inet6 ::1/128 scope host noprefixroute
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valid_lft forever preferred_lft forever
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2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
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link/ether 00:1e:06:45:65:a1 brd ff:ff:ff:ff:ff:ff
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inet 192.168.200.10/24 brd 192.168.200.255 scope global enp1s0
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valid_lft forever preferred_lft forever
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inet6 fe80::21e:6ff:fe45:65a1/64 scope link
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valid_lft forever preferred_lft forever
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3: enp2s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
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link/ether 00:1e:06:45:65:a2 brd ff:ff:ff:ff:ff:ff
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4: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
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link/ether 02:42:0c:2f:cd:cf brd ff:ff:ff:ff:ff:ff
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inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
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valid_lft forever preferred_lft forever
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inet6 fe80::42:cff:fe2f:cdcf/64 scope link
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valid_lft forever preferred_lft forever
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579: br-4b52c6c0b54e: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
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link/ether 02:42:ce:aa:2b:64 brd ff:ff:ff:ff:ff:ff
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inet 172.18.0.1/16 brd 172.18.255.255 scope global br-4b52c6c0b54e
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valid_lft forever preferred_lft forever
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inet6 fe80::42:ceff:feaa:2b64/64 scope link
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valid_lft forever preferred_lft forever
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581: veth8c2a433@if580: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master br-4b52c6c0b54e state UP group default
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link/ether 66:b7:62:3a:0a:70 brd ff:ff:ff:ff:ff:ff link-netnsid 0
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inet6 fe80::64b7:62ff:fe3a:a70/64 scope link
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valid_lft forever preferred_lft forever
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```
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# Change IP settings
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## netplan
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### 파일 확인
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```shell
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ls /etc/netplan
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```
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```
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50-cloud-init.yaml
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```
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### 내용 수정
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```shell
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sudo vim /etc/netplan/50-cloud-init.yaml
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```
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```yml
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# This file is generated from information provided by the datasource. Changes
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# to it will not persist across an instance reboot. To disable cloud-init's
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# network configuration capabilities, write a file
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# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
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# network: {config: disabled}
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network:
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ethernets:
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enp1s0:
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# IP address
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addresses:
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- 192.168.200.10/24
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# DNS
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nameservers:
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addresses: [192.168.200.10]
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search: []
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# Gateway
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routes:
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- to: default
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via: 192.168.200.1
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enp2s0:
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dhcp4: true
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optional: true
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version: 2
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```
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## /etc/systemd/resolved.conf
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DNS의 경우 /etc/systemd/resolved.conf 파일 수정이 필요할 수 있음
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```
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# This file is part of systemd.
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#
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# systemd is free software; you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation; either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# Entries in this file show the compile time defaults. Local configuration
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# should be created by either modifying this file (or a copy of it placed in
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# /etc/ if the original file is shipped in /usr/), or by creating "drop-ins" in
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# the /etc/systemd/resolved.conf.d/ directory. The latter is generally
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# recommended. Defaults can be restored by simply deleting the main
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# configuration file and all drop-ins located in /etc/.
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#
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# Use 'systemd-analyze cat-config systemd/resolved.conf' to display the full config.
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#
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# See resolved.conf(5) for details.
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[Resolve]
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# Some examples of DNS servers which may be used for DNS= and FallbackDNS=:
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# Cloudflare: 1.1.1.1#cloudflare-dns.com 1.0.0.1#cloudflare-dns.com 2606:4700:4700::1111#cloudflare-dns.com 2606:4700:4700::1001#cloudflare-dns.com
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# Google: 8.8.8.8#dns.google 8.8.4.4#dns.google 2001:4860:4860::8888#dns.google 2001:4860:4860::8844#dns.google
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# Quad9: 9.9.9.9#dns.quad9.net 149.112.112.112#dns.quad9.net 2620:fe::fe#dns.quad9.net 2620:fe::9#dns.quad9.net
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DNS=192.168.200.10
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#FallbackDNS=
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#Domains=
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#DNSSEC=no
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#DNSOverTLS=no
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#MulticastDNS=no
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#LLMNR=no
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#Cache=no-negative
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#CacheFromLocalhost=no
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DNSStubListener=no
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#DNSStubListenerExtra=
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#ReadEtcHosts=yes
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#ResolveUnicastSingleLabel=no
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#StaleRetentionSec=0
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```
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>[!note]
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>최초 설치시 /etc/systemd/resolved.conf 파일은 DNS와 DNSStubListener=no 부분이 주석처리되어 있으며 DNS 서버 설치 시 해당 파일을 수정해야 함. [[../Home Server/Network/DNS/CoreDNS#추가로 필요한 사항 - 리눅스|참고]]
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