NAME
upx - compress or expand executable files
SYNOPSIS
upx [ *command* ] [ *options* ] *filename*...
ABSTRACT
The Ultimate Packer for eXecutables
Copyright (c) 1996-2006 Markus Oberhumer, Laszlo Molnar & John Reiser
http://upx.sourceforge.net
UPX is a portable, extendable, high-performance executable packer for
several different executable formats. It achieves an excellent
compression ratio and offers **very** fast decompression. Your
executables suffer no memory overhead or other drawbacks for most of the
formats supported, because of in-place decompression.
While you may use UPX freely for both non-commercial and commercial
executables (for details see the file LICENSE), we would highly
appreciate if you credit UPX and ourselves in the documentation,
possibly including a reference to the UPX home page. Thanks.
[ Using UPX in non-OpenSource applications without proper credits is
considered not politically correct ;-) ]
DISCLAIMER
UPX comes with ABSOLUTELY NO WARRANTY; for details see the file LICENSE.
This is the first production quality release, and we plan that future
1.xx releases will be backward compatible with this version.
Please report all problems or suggestions to the authors. Thanks.
DESCRIPTION
UPX is a versatile executable packer with the following features:
- excellent compression ratio: compresses better than zip/gzip,
use UPX to decrease the size of your distribution !
- very fast decompression: about 10 MB/sec on an ancient Pentium 133,
about 200 MB/sec on an Athlon XP 2000+.
- no memory overhead for your compressed executables for most of the
supported formats
- safe: you can list, test and unpack your executables
Also, a checksum of both the compressed and uncompressed file is
maintained internally.
- universal: UPX can pack a number of executable formats:
* atari/tos
* bvmlinuz/386 [bootable Linux kernel]
* djgpp2/coff
* dos/com
* dos/exe
* dos/sys
* linux/386
* linux/elf386
* linux/sh386
* ps1/exe
* rtm32/pe
* tmt/adam
* vmlinuz/386 [bootable Linux kernel]
* vmlinux/386
