I am a big fan of fdisk, and since the output of fdisk is the block size of each partition I had to find a way to know how much each partition’s size in GB…
Do the regular fdisk command, and note the block size:
# fdisk -l /dev/sda
output omitted…
Device Boot Start End Blocks Id System
/dev/xvdc1 * 1 2871 23061276 83 Linux
…output omitted
Then using bc (An arbitrary precision calculator language) do:
# echo “23061276/(2^20)” | bc
21
Which will output the partition size in GB