10-05-2012
First and foremost, Linux is not UNIX because it says so. The GNU system which Linux is a part of stands for "GNU's Not UNIX". They named GNU that to set it apart from the very expensive commercial UNIX distributions that were dominant at the time.
It's extremely similar. Folders and devices and networking works the same way. Not all the utilities are quite the same, configuration is different, and the kernel's features are still changing as its developers experiment.
On the other hand -- not even all UNIX is alike. It's really not that different.
What do you really need to know about Unix? I'd start with the Bourne shell and the concepts underlying it(directories, files, and so forth). That will be handy no matter where you go in UNIX and LINUX. You can boot an OS in virtualbox, install another hard drive and dual-boot, boot a Linux livecd for an environment that's hard to mess up -- it's a CD, you can't delete something by accident. Lots of ways.
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LEARN ABOUT DEBIAN
datetime::format::epoch::unix
DateTime::Format::Epoch::Unix(3pm) User Contributed Perl Documentation DateTime::Format::Epoch::Unix(3pm)
NAME
DateTime::Format::Epoch::Unix - Convert DateTimes to/from Unix epoch seconds
SYNOPSIS
use DateTime::Format::Epoch::Unix;
my $dt = DateTime::Format::Epoch::Unix->parse_datetime( 1051488000 );
# 2003-04-28T00:00:00
DateTime::Format::Epoch::Unix->format_datetime($dt);
# 1051488000
my $formatter = DateTime::Format::Epoch::Unix->new();
my $dt2 = $formatter->parse_datetime( 1051488000 );
$formatter->format_datetime($dt2);
DESCRIPTION
This module can convert a DateTime object (or any object that can be converted to a DateTime object) to the number of seconds since the
Unix epoch.
METHODS
Most of the methods are the same as those in DateTime::Format::Epoch. The only difference is the constructor.
o new()
Constructor of the formatter/parser object. It has no parameters.
SUPPORT
Support for this module is provided via the datetime@perl.org email list. See http://lists.perl.org/ for more details.
AUTHOR
Eugene van der Pijll <pijll@gmx.net>
COPYRIGHT
Copyright (c) 2003 Eugene van der Pijll. All rights reserved. This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
SEE ALSO
DateTime
datetime@perl.org mailing list
perl v5.10.1 2007-12-03 DateTime::Format::Epoch::Unix(3pm)