There's actually no need to really change the password. The check for used passwords has its limits, so after going through [password]1 to, let's say, [password

There's actually no need to really change the password. The check for used passwords has its limits, so after going through [password]1 to, let's say, [password]20, it lets you use [password]1 again. A script (for loop with smbpasswd, for example) can do this in a few seconds.