NAME¶
uml_mkcow — create a new COW file
SYNOPSIS¶
uml_mkcow [
-f] [COW_file] [backing_file]
DESCRIPTION¶
This manual page documents briefly the
uml_mkcow command.
This manual page was written for the
Debian GNU/Linux distribution
because the original program does not have a manual page. Instead, it has
documentation in HTML format; see below.
uml_mkcow is a small utility to create COW (Copy-On-Write) files without
the need to run the full UML kernel.
NOTE: you can save a lot of disk space using COW files. When checking the size
of the COW file in order to see the gobs of space that you're saving, make
sure you use 'ls -ls' to see the actual disk consumption rather than the
length of the file. The COW file is sparse, so the length will be very
different from the disk usage.
OPTIONS¶
- -f
- Force overwrite of an exsiting COW file.
EXAMPLES¶
Create a new COW file:
uml_mkcow rootfs_COW rootfs
Overwrite (destroying) an existing COW file:
uml_mkcow -f rootfs_COW rootfs
SEE ALSO¶
The
UserModeLinux-HOWTO (link to URL
http://user-mode-linux.sourceforge.net/UserModeLinux-HOWTO.html)
AUTHOR¶
uml_mkcow was written by Steve Schnepp.
This manual page was written by Mattia Dongili malattia@debian.org for the
Debian GNU/Linux system, based on material in the UserModeLinux-HOWTO
by Rusty Russell.