pam-login-interval

A PAM module that enforces a minimum time between logins.

Prerequisites

gcc, make, and PAM development libraries are required. Debian/Ubuntu-based:

sudo apt install gcc make libpam0g-dev

Getting Started

Build and install the module via:

make
sudo make install

Add the following to your PAM config, e.g. to /etc/pam.d/lightdm to use this module with LightDM logins:

   account required pam_login_interval.so target_user=your.user.name min_interval=30m

change the target_user and min_interval arguments as required.

Module Parameters

You should specify the following parameters in the PAM configuration:

• target_user: The user to limit logins for. For any other users, this module will not interfere with logins. If not specified, the min_interval setting will be applied to all users!
• min_interval: (required) The minimum time since the user's last login. This can be a number in seconds, or a duration in the form 1d2h3m4s or 30m. If a login is attempted before this time has elapsed, the login will be rejected.