How to add new users in centos7
1. Create a new user
adduser [用户名]
2. Modify the password of the new user
passwd [用户名]
Because the newly created user does not The sudo command cannot be used, so we need to add authorization to it.
3. Add writable permissions to the sudoers file
chmod -v u+w /etc/sudoers
4. Open the sudoers file in the vim editor
vim /etc/sudoers
in the sudoers file Find the following location and add the following content:
[用户名] ALL=(ALL) ALL（如需新用户使用sudo时不用输密码，把最后一个ALL改为NOPASSWD:ALL即可）
Recommended tutorial: centos tutorial
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