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개요

OS	디렉터리	파일	네트워크 재설정 명령	비고
RHEL7, 8	/etc/sysconfig/network-scripts	ifcfg-eno1	systemctl restart network
RHEL9	/etc/NetworkManager/system-connections	eno1.nmconnection	systemctl restart NetworkManager	설정 디렉터리 내 내용 전부 지우면 network-scripts 로 동작함
Ubuntu 16	/etc/network	interfaces	systemctl restart network
Ubuntu	/etc/netplan	xxx.yaml, xxx.yml	netplan apply

nmtui

OS 무관하게 터미널에서 사용가능한 명령어

network-scripts 예제 (ifcfg 형식)

BASH 형식

TYPE=Ethernet
MTU=9000

NAME=eno1
DEVICE=eno1

ONBOOT=yes

# DHCP 인 경우
BOOTPROTO=dhcp

# 고정IP 인 경우
# BOOTPROTO : none 또는 static
# NETMASK, PREFIX 중 하나를 설정
BOOTPROTO=static
IPADDR=192.168.0.1
NETMASK=255.255.255.0
PREFIX=24
GATEWAY=172.16.10.1

# DNS
DNS1=134.75.30.1
DNS2=8.8.8.8

DEFROUTE=yes
IPV4_FAILURE_FATAL=no

IPV6INIT=yes
IPV6_DISABLED=no
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no

# 방화벽 존
ZONE=public

IPv6 예제

TYPE=Ethernet
MTU=9000

NAME=eno1
DEVICE=eno1

ONBOOT=yes

# DHCP 인 경우
BOOTPROTO=dhcp

# 고정IP 인 경우
IPV6INIT=yes
IPV6_AUTOCONF=no
IPV6_FORCE_ACCEPT_RA=no
IPV6ADDR=fc00:320:11:248::10/64
IPV6_DEFAULTGW=fc00:320:11:248::1

DNS1=2001:4860:4860::8888

network-scripts deprecated

# cat /etc/sysconfig/network-scripts/readme-ifcfg-rh.txt

NetworkManager stores new network profiles in keyfile format in the
/etc/NetworkManager/system-connections/ directory.

Previously, NetworkManager stored network profiles in ifcfg format
in this directory (/etc/sysconfig/network-scripts/). However, the ifcfg
format is deprecated. By default, NetworkManager no longer creates
new profiles in this format.

Connection profiles in keyfile format have many benefits. For example,
this format is INI file-based and can easily be parsed and generated.

...

NetworkManager 예제 (ini 형식)

[connection]
id=eno1
interface-name=eno1
type=ethernet
autoconnect=false

[ethernet]
mtu=9000

[ipv4]
; DHCP 인 경우
method=auto

;고정 IP 인 경우
method=manual
address1=192.168.16.240/24,192.168.16.1
dns=134.75.30.1;

[ipv6]
addr-gen-mode=eui64
method=auto

[proxy]

netplan 형식 (yaml 형식)

하기 문서에서 Examples 참고
https://manpages.ubuntu.com/manpages/jammy/man5/netplan.5.html

network:
  ethernets:
# Network A - Default Route
    eno1:
      mtu: 9000
      dhcp4: false
      addresses:
          - 172.16.0.20/24
      gateway4: 172.16.0.1
      nameservers:
          addresses: [8.8.8.8, 8.8.4.4]
# Network B
    eno2:
      mtu: 9000 
      dhcp4: false
      addresses:
          - 192.168.0.10/24
      # gateway4: 192.168.0.1 # important - disable default gateway for Network B
      routes:
          # route for internal (if needed)
          - to: 192.168.0.10/24
            via: 192.168.0.1
            metric: 0
# Network B
    eno3:
      dhcp4: true
      dhcp4-overrides:
        use-routes: false
      routes:
        - to: 192.168.100.0/24
          via: 192.168.100.1
          metric: 0
  version: 2

interfaces 예제

https://wiki.debian.org/NetworkConfiguration

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto ens160
iface ens160 inet static
	address 192.168.100.1
	netmask 255.255.255.128
	network 192.168.100.0
	gateway 192.168.100.1
	dns-nameservers 134.75.30.1