In the manual I see: The SIZE argument is an integer and optional unit (example: 10K is 10*1024). Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,... (powers of 1000).
1. Why df not using Ki, Mi, Gi etc. in powers od 1024 ?? 2. On my computer: df -H print: ----- none _504k_ 0 _504k_ 0% /dev ----- df -H ----- none 492K 0 492K 0% /dev ----- I see the difference in the presentation of results and what is in the manual -> (...) KB,MB,... (powers of 1000) (...) but df -H print small letter k Best regards. Christopher Labus