Create system command tail to output last x lines from a file.
Also make an interactive mode (or perhaps a separate command) to updates every few seconds until exited to keep watching a log file during an operation.
Ok, Grant, as per Brad, you have been assigned now!
Looks good, added it to the core today. Not sure if we should leave the buffer open to simulate the real tail comand as interactive? maybe an argument interactive=true,false.