Perhaps the best place for them to ask their questions would be on the retrocomputing community.
[Retrocomputing Beta][1]  

...Or on Unix & Linux or Super User, as suggested by @terdon.
[Unix & Linux][2]
[Super User][3]


  [1]: https://retrocomputing.stackexchange.com/
  [2]: https://unix.stackexchange.com/
  [3]: https://superuser.com/