A method for industrially changing the passwords of users in an AIX/UNIX system including a plurality of stations. A system being managed by a system administrator located at one of the stations is able to change the passwords of at least a set of users. The method comprises the steps of building an initial program including a new password selected by the system administrator for replacing the current password of all users, compiling the initial program in order to obtain an executable program, transmitting the executable program to the stations, and executing in each station, the executable program in order to obtain an encrypted string corresponding to the new password, the encrypted string being specific to the stations wherein the executable program is executed.