how can i? open a website every 6 hrs

Define 'open up', please.

Do you just mean display the web page(s) in a browser?
Are you just looking to open a specific URL (or URLs)? Or actually interact with the site in some way?

In other words, more details, please.

I'll assume you use Safari as your default browser.

• Drag the URL from the Safari location bar to the Desktop (or some other convenient location) to create a webloc file.
• Create recurring events in iCal at the desired times of day. Set an "Open File" Alarm. Select the webloc file.

If you want that 1 min to be cumulative, so that the time drifts day after day, then that is going to be a lot harder.

I had a friend who did something like this once. He used something called a cron job. Apparently it's a Linux daemon included in OSX. Depending on your level of computer savvy you could also look into that. A cron script would definitely let you open at drifting intervals.

http://www.unixgeeks.org/security/newbie/unix/cron-1.html

Apparently it's a Linux daemon

No it isn't. It's a standard UNIX daemon.

A cron script would definitely let you open at drifting intervals.

Really? Off-hand, I can't see how. Cron is very good at running tasks at specific times (e.g. 10:34am every Monday, 12:15am on the first day of every months, etc.), and even reasonably good at regular intervals (e.g. every 2 hours, every 15 minutes), but there's no way with cron to set a drift.

Given that the OP wants '6 hours and one minute' intervals, you'd be looking at something like:

Monday, 00:00
Monday, 06:01
Monday, 12:02
Monday, 18:03
Tuesday, 00:04
Tuesday, 06:05
Tuesday, 12:06

There's no way for cron to do this. The only possible way I can think is to run it every 6 hours and add the delay logic to the script itself - invoke the script every 6 hours and have the script pause for a set number of minutes based on how many times it's been run. But even then you need to define some kind of limit - you don't want an indefinite counter running otherwise you'll eventually end up with a delay that's greater than the cron launch interval.

No. 'cron' won't do that, but 'at' will. For example:

at now +361 min /path/to/my/script

Then you can have a script like:

#!/bin/sh
open http://somemachine.net/my/favorite/page.html
at now +361 min $0

You might try launchd which takes over many tasks of cron as well as other stuff, and to use it you might try Lingon, http://sourceforge.net/projects/lingon/files/, although it is now out of development. I used Lingon last year and found it quite useful, whether or no it is happy under SL I do not know. But there are lots of examples on the web about how to set up an agent for launchd and it might provide an alternative.

An iCal event is probably the easiest though, and you can hook in an automator script to make things really exciting.

Lawrence

I would have thought that would work, not sure why it does not. launchd has the ability to launch a script every "so-many" hours. Lingon will help you write the script for launchd as I note above.

I have set up a recurring iCal event which opens a URL for myself too. I'll see if it works over the next week or so.

Then my iCal suggestion should work perfectly. Create events for 7:00am, 1:15PM, and 7:30PM. Make each one a recurring event if you want this every day.