linux add users and groups under, and have sudo privileges

Adding users and groups, and have sudo privileges

1, add a user group

groupadd dev

2, was added and the home user group dev

useradd -g dev yujuan

3, change the user password

passwd yujuan

4. View Group

cat /etc/group

5, view the user

cat /etc/passwd

6, increase sudo permissions to user groups

sudo vim /etc/sudoers
%dev  ALL=(ALL)        NOPASSWD:ALL
//免密
%dev  ALL=(ALL)        ALL

7, to increase user sudo privileges

sudo vim /etc/sudoers
yujuan  ALL=(ALL)        NOPASSWD:ALL
//免密
yujuan  ALL=(ALL)        ALL

8, delete users

#如果有sudo权限，记得删除 /etc/sudoers的配置
userdel yujuan

9, delete user group

#如果有sudo权限，记得删除 /etc/sudoers的配置
groupdel dev