Question: I have a Raspberry Pi 1 running Raspbian. I tried running the SD card from it on a Raspberry Pi 3 but it didn't boot.

I've read various things about upgrading a Raspberry Pi 2 install to run on Raspberry Pi 3, but little for upgrading from 1 to 3.

Can anyone please help?

Answer: 
Have you tried the following commands?

(there is one more command, than Sufiyan wrote, he just installs it, but is not running it)

```
sudo -s
apt-get update
apt-get dist-upgrade
apt-get install rpi-update
rpi-update
halt

```

That worked for me, was once migrating some old RasPis to the new ones.
**The OS for Raspberry Pi 1 is mainly the same as Pi 3,**
so you should be able to install the software for this transfer.

Put NOOBS on the Pi 1's SD and boot. Find the "edit config" area and change the OS to Pi3

First, find a USB to MicroSD card adapter (found on Amazon for dirt cheap). Plug in the Pi 3's SD Card and choose it as the copy to device. Choose the Pi 1's SD as the source, then begin the copy. This can take up to 30 minutes. Next, safely eject the Pi 3's SD Card and format the Pi 1's SD. Next, insert the SDCard into your Pi 3 and boot.

*You now have Raspbian Full on the Pi 3.*