ok, from one of the earlier posts:
Enter 'help' for a list of built-in commands.

/home/user # apt-get remove healthcheck ?? apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Regex compilation error - Invalid preceding regular expression
/home/user #
/home/user # apt-get install healthcheck
Reading package lists... Done
Building dependency tree
Reading state information... Done
healthcheck is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 8 not upgraded.
/home/user #