The SITS - "Small ITS" - PDP-11/45 timesharing system will be available
for a while: telnet sits.pdp11.se
Type ^Z and login as RJL. Please :LOGOUT when you're done.
Hint #1. :SETD 0; sets the current directory to the root of disk 0.
Hint #2. :LISTF lists files.
Hint #3. :LOAD loads a file and $G starts it. $ is escape.
For more info see https://gunkies.org/wiki/SITS