How To check user configured with root privileges

Question

Suppose root user created a user say user1, and made entries in /etc/sudoers file for "user1" as "user1 ALL=(ALL) ALL". How can user1 check that he has privileges identical to root user ? Does it require to create a shell script for it ?

Solution

A user can see what he is allowed to run using sudo by running sudo -ll. No script is required. Below is an example:

$ sudo -ll
Matching Defaults entries for user1 on this host:
    env_reset, secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin

User user1 may run the following commands on this host:

Sudoers entry:
    RunAsUsers: ALL
    RunAsGroups: ALL
    Commands:
    ALL

To check if a certain command is allowed you can use sudo -l command. If the command is allowed the full path will be printed.

$ sudo -l ls
/bin/ls

To see what a different user is allowed to do you can add the option -U username.

Comments

[Lawrence]

Have a look at this - superuser.com/questions/553932/…

[pabouk - Ukraine stay strong]

@Braiam: Yes, of course. It would be a security hazard to reveal such a sensitive information without authenticating the user. ...but if you allow the user to use sudo without a password (using the NOPASSWD: directive) then sudo -ll will not ask for a password.