How to Check and Change Current Active Slot on Android [Fastboot

I never even knew that you could use fastboot with a locked bootloader! Learned something new

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fastboot get active slot But I want without fastboot command My usecase is the bootloader need to check the currect active slot and set the proper suffix How can I

fastboot getvar currentslot I was able to fix this with fastboot --set-active=a followed immediately by fastboot flash boot and all the other partitions