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The reason tutorials mention berryboot or NOOBS are because AFAIK they are the only boot managers for the Pi. I wouldn't use either, because they create too many problems with updating.

You CAN install other OS into different partitions, and manually change the boot partition to load the appropriate OS. It wouldn't be hard to write a script to do this. The /boot partition should be the same for all OS, just change root=/dev/mmcblk0p2 to point to other ext4 partitions with the OS; each OS would need to have /etc/fstab customised to match the partition the OS is in.

Frankly it is easier to just use separate SD Cards.

The reason tutorials mention berryboot or NOOBS are because AFAIK they are the only boot managers for the Pi. I wouldn't use either, because they create too many problems with updating.

You CAN install other OS into different partitions, and manually change the boot partition to load the appropriate OS. It wouldn't be hard to write a script to do this. The /boot partition should be the same for all OS, just change root=/dev/mmcblk0p2 to point to other ext4 partitions with the OS; each OS would need to have /etc/fstab customised to match the partition the OS is in. NOTE all OS should be using the same kernel.

Frankly it is easier to just use separate SD Cards.

The reason tutorials mention berryboot or NOOBS are because AFAIK they are the only boot managers for the Pi. I wouldn't use either, because they create too many problems with updating.

You CAN install other OS into different partitions, and manually change the boot partition to load the appropriate OS. It wouldn't be hard to write a script to do this.

Frankly it is easier to just use separate SD Cards.

The reason tutorials mention berryboot or NOOBS are because AFAIK they are the only boot managers for the Pi. I wouldn't use either, because they create too many problems with updating.

You CAN install other OS into different partitions, and manually change the boot partition to load the appropriate OS. It wouldn't be hard to write a script to do this. The /boot partition should be the same for all OS, just change root=/dev/mmcblk0p2 to point to other ext4 partitions with the OS; each OS would need to have /etc/fstab customised to match the partition the OS is in.

Frankly it is easier to just use separate SD Cards.

The reason tutorials mention berryboot or NOOBS are because AFAIK they are the only boot managers for the Pi. I would,t use either, because they create too many problems with updating.

You CAN install other OS into different partitions, and manually change the boot partition to load the appropriate OS. It wouldn't be hard to write a script to do this.

Frankly it is easier to just use separate SD Cards.

The reason tutorials mention berryboot or NOOBS are because AFAIK they are the only boot managers for the Pi. I wouldn't use either, because they create too many problems with updating.

You CAN install other OS into different partitions, and manually change the boot partition to load the appropriate OS. It wouldn't be hard to write a script to do this.

Frankly it is easier to just use separate SD Cards.