This function loads an File into an String.

Is this file the same as that file? The files may or may not be binary. We could compare the modify dates, or the sizes. But, those are not very accurate to know if a file has really changed.

Introducing MD5 Checksum. We can feed the files into Digest::MD5 in binary mode.

This is a great way to do Incremental Backups.

This is also an easy way to verify checksums when downloading files from the internet which list their MD5 Checksums.

You'll need the Digest::MD5 Perl Module.

Need to GZip a file using Perl?

Use Compress::Zlib.

This is a simple perl script which creates a GZip file.

A utility class that gets the MD5 hash of an input stream. Also includes a method for converting byte array to hex-formatted string.

Read a eight bytes in little endian order from the given InputStream and create a long out of them.

Deletes all files and folders from a directory, including read-only and
hidden files and folders. DelAll starts in the directory you tell it,
removes all read-only and hidden attributes from all the files, removes
all of the subfolders and then all files therein. When DelAll is done,
you will be left in the directory from which you called DelAll. The
directory that you want cleaned will not be deleted.

Create a backup, restore a backup, delete a Backup from IIS

Checks to see if a file or folder exists
The fFile variable determines whether you're
looking for a File (True) or Folder(False)
The strName variable holds the fully qualified
path you're looking For

this function returns the aggregated size
of all files in a directory and its subdirectories

Retrieve information about a file