NAME fallocate - preallocate or deallocate space to a file SYNOPSIS fallocate ... offset ] -l length [ -n ] filename fallocate -d [ -o offset ] [ -l length ] filename fallocatelevel preallocation support provided by Linux's fallocate (2) system call or Cygwin's posix ... fallocate (3), not the slow glibc implementation that writes a null byte into each b…