I have been asked by my company to create a system for production monitoring.
A very important component of this system will be a large LED panel showing production status.
Unfortunately I discoverd such components (for example the excellent Alphabrite panels) are very expensive: the mean quotation for a 2 line-21 chars ethernet controllable display is around 3000 USD!.
So I tought i could save several thousands euros of my budget with a little DIY.
(I have written this article in english since I wasn’t able to find any updated guide about this subject in any language).
DISCLAIMER. this is a very basic configuration. Not intended for production environment. Use at your own risk.
I have a small mailserver handling very few domains with mailboxes for may friends and relatives an it have been working fine for the last 8 years.
But it is based on the old CentOS 5 + sendmail and I think it is time to upgrade!
So, in order to test the new future configuration, I have performed a CentOS 7 minimum install on a virtual machine and tried to configure the minimum amount of packages to have it working.
Now let’s start!