====== Get Configuration Information ======
===== Check Using A/B partitions =====
If your device is running anything older than Android 7.1, skip this section as your device will not be using A/B nor system-as-root. First, you need to know whether your device is using A/B partitions. If you don’t know, use a terminal (adb shell or any terminal emulator) to check with this command:
<code>getprop ro.build.ab_update</code>
If the result is true, then your device is using A/B partitions.

If your device is A/B, then your device is also certainly using __**system-as-root**__. To find out whether you are using system-as-root on a non-A/B device, use a terminal to check with this command:

<code>getprop ro.build.system_root_image</code>
If the result is true, then your device is using system-as-root.

===== Find active slot (in fastboot)=====
Boot into fastboot bootloader and execute:
<code>fastboot getvar all</code>
Wait for a lot of text to finish scrolling and look for the "**(bootloader) current-slot**" text. This should actually be toward the bottom without the need to scroll up. The letter after this text will be the currently 
active partition slot for your device
===== Find active slot (via ADB)=====
<code>adb shell
getprop | grep slot</code>

===== Change active slot =====
Boot into fastboot bootloader and execute:
<code>fastboot --set-active=b (or fastboot --set-active='b')? </code>

===== List partitions =====
getprop ro.boot.bootdevice