NAME
zum - free disk space by making holes in files
SYNOPSIS
zum [FILE]...
DESCRIPTION
zum reads a files list on the command line and attempts to perforate
these files. Perforation means, that series of ‘0’ bytes are replaced
by lseek(2)s, thus giving the file system a chance of not allocating
real disk space for those bytes.
EXAMPLE
find . -type f -print0 | xargs -0 zum
If you zum under /boot, where your kernel image lives, your system will
become unbootable unless you run lilo again.
AUTHOR
Oleg Kibirev <oleg@gd.cs.CSUFresno.edu>.
Manual page by Heiko Schlittermann <heiko@lotte.sax.de>.