ubuntu

usermod -aG sudo <username>   //username to sudo

中文乱码问题解决：

apt-get purge locales

apt-get autoclean

apt-get install locales

cd /usr/share/locales

./install-language-pack en_US.UTF-8

dpkg-reconfigure locales

host
ssh-keygen -t rsa -C xx@example.com -f abc
guest
pub 放服务器上
cat abc.pub >> ~/.ssh/authorized_keys
sudo visudo
最后一行加
xxx ALL=(ALL)NOPASSWD: ALL