Most web servers run on UNIX machines
and UNIX OSes distinguish capital letters from non-capital
ones. This is important, because Windows do NOT
distinguish them and locally accessible files on
Windows are not necessarily accessible on the UNIX servers
to which you upload the files.
For example, the following file names
are all different on UNIX system, while they are recognised
identical on Windows system.
eg.
example.gif, Example.gif, eXamPle.gif,
example.GIF.
So, make sure you clearly state file
names in HTML documents. Some graphic editors INTENTIONALLY
use capitalised suffixes such as .GIF or .JPEG instead
of .gif or .jpeg. This results in FILE NOT FOUND error.
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