When a user successfully authenticates with sudo, a time stamp file is updated to allow that user to continue running sudo without requiring a password for a preset time period (five minutes by default). The user’s time stamp file can be reset using sudo -k or removed altogether via sudo -K. A user who has sudo access and is able to control the local clock (common in desktop environments) can run a command via sudo without authenticating as long as they have previously authenticated themsel...
