使用'fdisk -l |的输出 grep Disk”放入“ if”语句

Question

My goal is to use the finding from 'fdisk -l | grep Disk' to run an if statement based off what it finds. Basically, my school has 2 harddrive sizes, 320GB and 500GB. If it finds a 320GB drive, it should continue with the partition. If it finds a 500GB it should stop.

$ fdisk -l | grep Disk
Disk /dev/sda: 320.1 GB, 320072933376 bytes
Disk identifier: 0x00027998

I want to "grab" that 320. Can that be done using awk or maybe a head/tail -c? I'm extremely new to shell script. Thanks!

Answer 1

Try this:

size=$(fdisk -l | awk '$1=="Disk" && $2 ~ /^\/dev\/.*/ {print $3}')
if (( ${size%.*} == 320 )); then ...