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Top Forums Shell Programming and Scripting Compare file dates before copy Post 303021442 by Neo on Thursday 9th of August 2018 11:32:27 AM
Old 08-09-2018
Yes, because it will not overwrite the old backup.

That is a "good thing" because you don't want to automatically overwrite your backups.

The purpose of having backups is to have a lot of them incase there was a problem.

For example.

Let's say that in two weeks time, you discover a criminal hacked into your system a week ago and did some bad things.

If you only have the latest backup, two weeks from now, you will certainly not have the backup from three weeks ago (from two weeks in the future).

So, if you want to be safe and take care of your users and user data, you must have backups going back ... a long way... depending on how critical your data is.

Then, as a good sys admin, you delete your very old backups (manually is best) when you are confident you don't need them.

That's how it is done.

Otherwise, you will f*ed very much when you discover in a month someone hacked you two weeks ago from today Smilie
 

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DATETIME.SETTIMESTAMP(3)						 1						  DATETIME.SETTIMESTAMP(3)

DateTime::setTimestamp - Sets the date and time based on an Unix timestamp

       Object oriented style

SYNOPSIS
public DateTime DateTime::setTimestamp (int $unixtimestamp) DESCRIPTION
Procedural style DateTime date_timestamp_set (DateTime $object, int $unixtimestamp) Sets the date and time based on an Unix timestamp. PARAMETERS
o $object -Procedural style only: A DateTime object returned by date_create(3). The function modifies this object. o $unixtimestamp - Unix timestamp representing the date. RETURN VALUES
Returns the DateTime object for method chaining or FALSE on failure. EXAMPLES
Example #1 DateTime.setTimestamp(3) example Object oriented style <?php $date = new DateTime(); echo $date->format('U = Y-m-d H:i:s') . " "; $date->setTimestamp(1171502725); echo $date->format('U = Y-m-d H:i:s') . " "; ?> Procedural style <?php $date = date_create(); echo date_format($date, 'U = Y-m-d H:i:s') . " "; date_timestamp_set($date, 1171502725); echo date_format($date, 'U = Y-m-d H:i:s') . " "; ?> The above examples will output something similar to: 1272508903 = 2010-04-28 22:41:43 1171502725 = 2007-02-14 20:25:25 NOTES
Using the Unix timestamp format to construct a new DateTime object is an alternative when using PHP 5.2, as shown in the example below. Example #2 DateTime.setTimestamp(3) alternative in PHP 5.2 <?php $ts = 1171502725; $date = new DateTime("@$ts"); echo $date->format('U = Y-m-d H:i:s') . " "; ?> The above example will output something similar to: 1171502725 = 2007-02-14 20:25:25 SEE ALSO
DateTime.getTimestamp(3). PHP Documentation Group DATETIME.SETTIMESTAMP(3)
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