Find all Bootable Partitions

#displays partition info with * in second colonum for boot partition
sudo fdisk -l

#Just greping for * does not work
sudo fdisk -l |grep '*' #quotes need around *

#use awk to find match in second colum
sudo fdisk -l | awk '$2 == "*"

#display just the partition match
sudo fdisk -l | awk '$2 == "*" {print $1}'