How to Increment or add minutes???;-)

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LEARN ABOUT DEBIAN

leave

LEAVE(1)						    BSD General Commands Manual 						  LEAVE(1)

NAME

     leave -- remind you when you have to leave

SYNOPSIS

     leave [[+]hhmm]

DESCRIPTION

     leave waits until the specified time (within the next 12 hours), then reminds you that you have to leave by writing to the TTY that you exe-
     cuted leave on.

     You are reminded 5 minutes and 1 minute before the actual time, at the time, and every minute thereafter.	When you log off, leave exits just
     before it would have printed the next message.

OPTIONS

     hhmm  The time of day is in the form hhmm where hh is a time in hours (on a 12 or 24 hour clock), and mm are minutes.

	   However, all times are converted to a 12 hour clock, and assumed to be in the next 12 hours.  An attempt to set an alarm for farther
	   into the future will be truncated to within the next 12 hours.

     +	   If the time is preceded by '+', the alarm will go off in hours and minutes from the current time.

     If no argument is given, leave prompts with "When do you have to leave?"  A reply of newline causes leave to exit, otherwise the reply is
     assumed to be a time.  This form is suitable for inclusion in a ~/.login or ~/.profile.

SEE ALSO

     calendar(1), csh(1), sh(1)

HISTORY

     The leave command appeared in 3.0BSD.

BUGS

     In the modern age with X(1) and window multiplexing programs like window(1) and screen(1), the leave command's reminders and admonitions
     might not be seen if the user has the window where leave was started minimized or obscured.

     This all begs for a more general user notifications system to be implemented.

BSD
								 January 19, 2002							       BSD

Shell Programming and Scripting