Sudo and Sudoers File
Get started with Linux
Understanding the Sudo command
sudo in Linux or Unix Operating System environment is a abbrevation of “super-user do”.
The power of running a command with this privileges its bigger.
The Sudoers File
The sudo command is configured through a file located in /etc/ called sudoers.
You can configurate users to able to run as sudo that can be done by editing sudoers file.
Important: Be careful! Editing the sudoers file, with errors or bad syntax may result in locking out all users on your distribution.
A picture is worth a thousand words, as the picture tells us much more than words.
User Privilege Specification Lines
Group Privilege Specification Lines
The next line is similar to the user privilege line 👆, but names beginning with a %.
You are in / etc / sudoers
It’s a trick of a ctf to check sudoers,if there are commands that we can execute as root without using a password, we can abuse them. Let’s imagine the following scenario:
What commands a usually www-data user, or any other user has with which we enter, can execute as super user, you need to execute the command:
sudo -lI hope you like.
