우분투 20.04 네트워크 관련 명령

안녕하세요 #카트로 입니다.

오늘은 우분투 20.04 버전의 네트워크 관련 명령을 알아 볼게요

 

 

 

- NIC 확인

$ lshw -class network -short
H/W path          Device      Class          Description
========================================================
/7                eth0        network        Ethernet interface
/8                eth1        network        Ethernet interface
/9                eth2        network        Ethernet interface

 

 

- ip설정

$ sudo vi /etc/netplan/00-installer-config.yaml

# dhcp 자동할당 설정
# This is the dhcp network config written by 'katro'
network:
  ethernets:
    eth0:
      dhcp4: true
  version: 2
  
# static IP지정 설정
# This is the static network config written by 'karto'
network:
  ethernets:
    eth0:
      addresses: 
        - 192.168.0.10/24
      gateway4: 192.168.0.1
      nameservers:
        addresses:
        	- 168.126.63.1
  version: 2

 

 

- IP설정 적용

$ sudo netplan apply

 

 

- IP 정보 확인

$ ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.179  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::4015:5dff:fe00:4900  prefixlen 64  scopeid 0x20<link>
        ether 42:15:5d:00:49:00  txqueuelen 1000  (Ethernet)
        RX packets 10533757  bytes 1313945992 (1.3 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 159723  bytes 7972608 (7.9 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.182  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::4015:5dff:fe00:4902  prefixlen 64  scopeid 0x20<link>
        ether 42:15:5d:00:49:02  txqueuelen 1000  (Ethernet)
        RX packets 21013  bytes 16213810 (16.2 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3413  bytes 380594 (380.5 KB)
        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 1138  bytes 122909 (122.9 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1138  bytes 122909 (122.9 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0