On Wed, 8 Feb 2023 at 14:57, Will Senn <will.senn@gmail.com> wrote:
...
pdp11v/usr/man/a_man/man8/trouble.8
pdp11v/usr/man/u_man/man1/trouble.1
Anybody know what pdp11v is? or where the source code for the utility is? Did it send email, or what?


I believe it is SVR1, which targeted the PDP-11.  No idea where the source is, though note that the man page says that trouble is a frontend to what appears to be an internal Bell Labs logging system.

-Henry