[Xastir] UpdateTime: Readline error: 9

[Jason KG4WSV]

<pid> is the process ID, the number than uniquely identifies a process
on a unix system.

One form of unix interprocess communication is a numeric signal.  The
TERM signal is for terminate, so the OS can tell the process to die
(most commonly used when the OS is shutting down).  A process may trap
or "handle" these signals by setting up a signal handler function, so
for example files that are being written can be closed out properly
before the program exits.  If you are familiar with hardware
interrupts and interrupt handlers, signals and signal handlers are the
software equivalent.

The 9 or KILL signal cannot be trapped (and therefore cannot be
ignored).  It is used to kill a misbehaving app if you can't get its
attention any other way.

-Jason
kg4wsv