Reminding Yourself With Linux
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Reminding you when you have to leave
leave tool to remind you when you have to
leave (you can get either the Debian package or its original NetBSD
sources from here at debian.org). Give
as an argument the time, in 24-hour format, when you have to go.
To remind yourself to leave at 8:05pm, type:
leave 20:05 RET
You'll get a reminder printed on your screen five minutes before the given time, one minute before the time, at the time itself and then every minute subsequently until you log off.
Running a command on a timer
sleep tool does nothing but wait (or "sleep") for
the number of seconds specified as an argument. Use this followed by
; character (the shell command separator) and another command to run
that command after the amount of time you specify. This is useful to
run a command at a later time during your current session.
You can use it to send you some kind of reminder in a set amount of
time -- like the audio output of the
saytime tool, which
"speaks" the current time in a human voice. It's available as a Debian
package or from its Web site at acme.com.
Since the shell where you type this command will be unusable until the command you give is executed (or until you interrupt it), type this command in a console or window other than one you might be working in.
To ring the bell in thirty seconds, type:
sleep 30; echo -e '\a'
You can also follow the numeric option with a unit:
s seconds m minutes h hours d days
To announce the time in exactly five minutes, type:
sleep 5m; saytime &
Next week: connecting your Linux box to the Internet.
Michael Stutz was one of the first reporters to cover Linux and the free software movement in the mainstream press.
Read more Living Linux columns.