Reporting – pvs, lvs, vgs(2)

You can sort on a list of fields using -O. It's not necessary to display the fields you're sorting on. Precede a field with a minus sign to reverse the sort order.
Specify output units with --units: hHsbBkKmMgGtT. Lower-case uses multiples of 1024; upper-case uses 1000.
Options to help you format the output for processing:
- --separator
- --unbuffered
- --aligned
- --nosuffix
- --noheadings

You can sort on a list of fields using -O. It's not necessary to display the fields you're sorting on. Precede a field with a minus sign to reverse the sort order.