Linux 命令行账户管理
执行 sudo vi /etc/suduers, 然后输入：
username ALL=(ALL) NOPASSWD: ALL
useradd -m USERNAME # add a user
userdel USERNAME # delete a user
passwd -e # password expire next time user login
groups username # view username groups
usermod -G groupname username # add user to a group
usermod -g groupname username # set user to a group
newgrp
make newly added group work immediately without login/out
chsh 提示输入密码的问题
Changing /etc/pam.d/chsh: from:
auth required pam_shells.so
to
auth sufficient pam_shells.so