NAME gluhncheck - Check number with Luhn's algorithm SYNOPSIS gluhncheck DESCRIPTION gluhncheck is a graphical utility that checks that a number, containing a check digit, is valid according to Luhn's algorithm. OPTIONS The gluhncheck utility conforms to the Base Definitions volume of POSIX.1-2017, Section 12.2, Utility Syntax Guidelines. No options are supported. OPERANDS No operands are supported. SEE ALSO luhncheck(1)