Hi Following link at https://www.3cx.com/blog/docs/linux-version-9-stretch/ I was able to install and do the initial configure of 3CX om Debian 9.2 without difficulty. Must be good instructions! However when I used Synaptic Package Manager to Update, I clicked "Mark All upgrades". Under the warning " To Be Removed" is listed 3cxpbx. The first time, I proceeded, (because my finger is faster than my brain) my shiny new 3CX was completely deleted. Other than avoiding upgrades, How do I avoid this? I'm still new at Linux. Thanks.