Someone was having trouble installing some software where they had to specify a password on the command line. The password happened to be something like big$$dog and they were doing something like:
install -password big$$dog
It seemed OK, but when they went into the admin utility the password didn’t work. Anyone familiar with Unix shells should see the problem right away:
$ echo big$$dog big9975dog
In bash, ‘$$’ evaluates to the current process ID, which gets substituted before the command is run. Enclosing the password in single quotes would fix the problem.
 Actual password & command name changed due to their proprietary nature.