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missing scheme in email body url
Some mail service providers (Yahoo Mail exhibits this at the moment), do not like links that do not have a scheme(http/https for instance) and will make the link non-clickable by removing the href. The fix is simple: Google Google
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how to not run a cron job between certain datetimes
Say, I have a cron job entry and do not want the job to run between 2013-02-01 9PM (Feb 1st 2013) and 2013-02-02 11AM (Feb 2nd 2013), this is one possible solution (in crontab).