I've been using RasPi, both 2 and 3, for coming up on two years. Unfortunately, it's always been for a couple of intense weeks at a time, followed by resumption of normal work duties, so my actual Pi time is a lot less than two years would suggest.
Most of the things a guy runs into I have solved by searching online or just using my Linux knowledge to work the puzzle.
There are a couple of things, however, that are uniquely Raspberry.
Last week I tried to get one of my Pi 3s to sign on to the corporate network. I'd done it before, and the results were still in wpa_supplicant.conf so I brought that up to date and tried again (PEAP + MSCHAPV2). The result was that, not only could I not connect to the corp network, I couldn't connect to any WiFi, and the wlan0 interface just stopped.
No problem. I had brought in a new SanDisk 32GB card, so I formatted that and loaded a fresh NOOBS download. Since I had my project files on the old card, I put it into a USB-to-SD adapter and plugged it into a USB port, and on another port I plugged in the 32GB Toshiba thumb drive that had the backup copies of the project files.
And then I booted up the Pi 3 with the new microSD + NOOBS, and 1) the WiFi setup was absolutely painless, so whatever you guys did with that, kudos! 2) I then went through the install of (and this is important) the DEFAULT version "[recommended]" of Raspbian.
You senior engineer types already know what happened next.
The NOOBS installer annexed both the 32GB Toshiba thumb drive and the old microSD card in the USB-to-SD adapter, assigning new partitions and reformatting, of course, and then it installed Raspbian [recommended] ... ONTO THE USB THUMB DRIVE.
Naturally, all my files were gone. Naturally, all my files on the OLD card were also gone. When I removed the thumb drive and took it over to my laptop, it looked (shocking, I know) EXACTLY like a microSD card that had Raspbian installed on it, right down to the media volume label "RECOVERY."
It's been years and years -- decades -- since I have committed a single event that lost so much data in the space of half an hour.
Lesson one: Always disconnect any additional storage media from the Raspberry Pi before installing NOOBS. (Exception: the Western Digital PiDrive procedure may require leaving the PiDrive connected, but that would be a special case.)
Okay, well, that sucked. And I can't boot the Pi without the thumb drive, so let's just reinstall NOOBS using, yes, Raspbian [recommended].
Up comes the installer. It says I have Raspbian [recommended] installed. Crap. Well, let's just uninstall that and use this other thing, Raspbian (with PIXEL). Oh. It's a download. A large download. Okay, go to lunch.
Excellent. It's done. Boot it up. Oh. This is different. This PIXEL thing has different defaults and stuff. I want my old Raspbian [recommended] back. Well, no problem, I'll just reinstall NOOBS. Hold SHIFT on boot. Wait. Raspbian [recommended] is no longer an option. Crap!
Clean card. Copy NOOBS. Boot up. What the heck??! Where did Raspbian [recommended] go?
New card. Format. Copy NOOBS. Boot up. DAMMIT! Where is Raspbian [Recommended] now? Did something in the install of Raspbian (with PIXEL) alter the firmware?
Two more tries. Same thing both times.
Okay. Fine. I can figure my way around PIXEL.
I'm fuming because I lost important project data. I'm resigned about PIXEL. And my work mates are all "dude, you look stressed."
So, I've spent yesterday and today recreating -- from memory -- the whole project. It's actually not too bad. Only a couple of minor things to sort.
But I'm annoyed that I can no longer install Raspbian [recommended] on this board. This is a walled garden application, with no exposure to the Internet, so I don't have the security concerns that make PIXEL the preferred choice.
So, having (mostly) resolved the lost data thing (yes, I found a backup of the 14GB of photos), my only remaining frustration is this: how do I revert back to being able to install Raspbian [recommended] from NOOBS instead of Raspbian (with PIXEL)? And what happened that made Raspbian [recommended] disappear from the list of available OS choices?
I hope you have found this entertaining, but I also hope you have something like an answer to "how can I get Raspbian [recommended] back?"
(P.S. I have ordered a new Pi 3. Hoping I can get DIFFERENT results with that, but I'm assuming things about the firmware.)