How to enable new ordinary users to use sudo to raise privileges in Ubuntu

Let's take Ubuntu with only root user as an example to create a normal user zhf

1. Log in to the system as the root user and create a user

useradd zhf

(Optional) Modify the default terminal. The new user I created here uses sh by default. It feels not as easy to use as bash. The most important thing is that there is no command Tab key to complete

vi /etc/passwd

Skip to the end user at the beginning of the line to find zhf just created, will be diverted at the end /bin/shinstead /bin/bash
save and exit

2. Create a user directory of zhf and modify the user and user group

mkdir /home/zhf && chown zhf:zhf /home/zhf

3. Set zhfuser password

passwd zhf

Note that the password will not be displayed under Linux *

4. Configure settings related to privilege escalation

Add write permissions for configuration files

chmod u+w /etc/sudoers

The zhf ALL=(ALL) ALL(temporary need to enter the sudo provide zhf password) or zhf ALL=(ALL) NOPASSWD:ALL(without the sudo provide temporary password) is added to /etc/sudoersthe

echo "zhf        ALL=(ALL) ALL" >> /etc/sudoers

echo "zhf        ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers

Restore the original permissions of the configuration file and remove the write permission

chmod u-w /etc/sudoers

5. Reboot the system, can be used to create the above- zhflogin and can provide the right to use sudo