Yes you could do it easily, and actually could be used as a computer hacking system. You set up a Perl script to run, preferrably as a Daemon, which wakes up once an hour, to check the time, and syncs the clocks. As the set runtime gets close the Daemon would wake up more and more frequently, checking the time, until at the exact time, considering program delay settings, it starts and runs the program.

A sleeping Daemon listening on a socket takes very little CPU. Look at Proc::Daemon

I'm not really a human, but I play one on earth. ..... an animated JAPH

In reply to Re: Scheduling a shell script to run every wednesday at 10 AM with perl without cron by zentara
in thread Scheduling a shell script to run every wednesday at 10 AM with perl without cron by kshitij

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.