debian

1. useradd -m xyz m 表示在 home 下创建相应的用户目录。

2. passwd xyz

3. usermod -a -G wheel xyz

如果出现错误提示，那么需要 usermod: group 'wheel' does not exist, 需要 addgroup wheel 参考: https://superuser.com/questions/716636/i-cant-add-a-user-to-the-wheel-group/716637

4. vi /etc/pam.d/su

auth       required   pam_wheel.so

5. vi /etc/login/refs

SU_WHEEL_ONLY yes

参考： https://blog.csdn.net/cbbbc/article/details/51712913

6. apt-get update, apt install sudo 安装 sudo

chmod u+w /etc/sudoers vi /etc/sudoers chmod u-w /etc/sudoers

%wheel  ALL=(ALL:ALL) ALL

参考: https://blog.csdn.net/xiaotengyi2012/article/details/7340822

7. 创建用户后，可能出现 tab 按键不能使用的问题。

vi /etc/passwd，找到用户名对应的哪一行， 把 sh 改为 bash 参考: https://blog.csdn.net/rzhzhz/article/details/7573201 https://www.cnblogs.com/klobohyz/archive/2011/12/22/2297392.html

centos

useradd xyz
passwd xyz
usermod -aG wheel xyz

参考: https://phoenixnap.com/kb/how-to-create-add-sudo-user-centos

ubuntu

adduser -m xyz
ls /home
passwd xyz
usermod -aG sudo xyz

参考： https://www.digitalocean.com/community/tutorials/initial-server-setup-with-ubuntu-16-04