Ubuntu 설치·네트워크·SSH

root 비밀번호

sudo passwd root

네트워크 (/etc/network/interfaces)

ifconfig
sudo vi /etc/network/interfaces

auto eth0
iface eth0 inet static
address 192.168.0.20
netmask 255.255.255.0
gateway 192.168.1.254
dns-nameservers 168.126.63.1 168.126.63.2 8.8.8.8

apt 미러 (kr → us)

sudo vi /etc/apt/sources.list
# vim: :%s/kr\./us./g
sudo apt update

필수 유틸·SSH

sudo apt install net-tools vim
dpkg -l | grep openssh-server
sudo apt-get install openssh-server
sudo service ssh start

root SSH 허용

sudo vi /etc/ssh/sshd_config
# PermitRootLogin yes
sudo service ssh restart