It seems lately we've been doing a number of Exchange migrations and we're seeing the dreaded "Security Alert".  In a nutshell, the server has an internal name which does not match the external name to which the certificate was assigned.  When the Outlook client is remote to the server, everything works as it should.  But when the Outlook client is internal, the user receives the following error:

It could be an obsessive compulsive trait or ... ah... who am I kidding.  I'm OCD and I have this need to clear the screen of anything that isn't part of my current process.  In Windows, the command is CLS, in Linux, the command is clear.  Pretty basic commands but in Linux there's a slightly fancier version which allows you to clear the line while in the midst of typing out a command by simultaneously pressing:

Ctrl L

Simple but helpful when you're in the middle of a long string.

We migrated a web site from Windows to Linux and immediately upon viewing the site, we realized the majority of the images were broken.

In the world of Windows, filename.JPG equals the same as filename.jpg but in the world of Linux, these are not the same.

In the images folder, the filenames were listed in the uppercase form but in the HTML, the files were referenced using the lowercase form.