.TH ZUM 1 "April 16, 2001" "Debian Project" "Debian Manual" .SH NAME zum \- free disk space by making holes in files .SH SYNOPSIS .B zum [\fIFILE\fR]... .SH DESCRIPTION .B 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 .BR lseek (2)s, thus giving the file system a chance of not allocating real disk space for those bytes. .SH EXAMPLE .IP .B find . -type f -print0 | xargs -0 zum .PP If you zum under /boot, where your kernel image lives, your system will become unbootable unless you run lilo again. .SH AUTHOR Oleg Kibirev . .PP Manual page by Heiko Schlittermann .