create user linux

adduser username

passwd username

visudo

add this:

(Có thể tạo 1 nhóm cho group sudo)

%admin ALL=(ALL) ALL
%sudo ALL=(ALL:ALL) ALL

Rồi add user vào nhóm đó:

groupadd sudo

usermod -a -G sudo username

username ALL=(ALL) ALL

su – username

ssh-keygen

touch ~/.ssh/authorized_keys

chmod 600 ~/.ssh/authorized_keys

chmod 700 ~/.ssh

delete user:

userdel -r username