Аналогично идее стилдрайвера , но с учетом звезд:
awk '{ $1 = 1 + gsub(/\*/, "", $1); print; }' < input > output
При выполнении на вводе выборки это приводит к:
2 15.934934
3 19.281281
4 78.20912
Из Вики BTRFS:
How can I recursively compress/uncompress a directory (including guessed/forced-compression)
Uset the btrfs filesystem defrag command, the option -r will process the files recursively in a directory. This is independent of the mount options compress or compress-force, and using the option -c you can set the compression algorithm.
Currently (v4.14), it's not possible to select "no compression", using the defrag command. This may change in the future.