Convert between byte count and “human-readable” string

Question

Is there a shell command that simply converts back and forth between a number string in bytes and the \"human-readable\" number string offered by some commands via the -h

Answer 1

There is no standard (cross-platform) tool to do it. But solution using awk is described here

Answer 2

numfmt

To:

echo "163564736" | numfmt --to=iec

From:

echo "156M" | numfmt --from=iec