NFS Services Administrator's Guide

Configuring and Administering AutoFS
Restarting AutoFS
Chapter 3112
If the ps command indicates that AutoFS is still active, ensure that
all users are out of the automounted directories and then try again.
Do not restart AutoFS until all automount processes are terminated.
6. To start AutoFS, enter the following command at the HP-UX prompt:
/sbin/init.d/autofs start