BusyBox_命令指南
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2014-10-14
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BusyBox - The Swiss Army Knife of Embedded Linux
NAME
BusyBox - The Swiss Army Knife of Embedded Linux
SYNTAX
busybox <applet> [arguments...] # or
<applet> [arguments...] # if symlinked
DESCRIPTION
BusyBox combines tiny versions of many common UNIX utilities into a single small executable. It
provides minimalist replacements for most of the utilities you usually find in GNU coreutils, util-linux, etc.
The utilities in BusyBox generally have fewer options than their full-featured GNU cousins; however, the
options that are included provide the expected functionality and behave very much like their GNU counterparts.
BusyBox has been written with size-optimization and limited resources in mind. It is also extremely modular so
you can easily include or exclude commands (or features) at compile time. This makes it easy to customize
your embedded systems. To create a working system, just add /dev, /etc, and a Linux kernel. BusyBox provides
a fairly complete POSIX environment for any small or embedded system.
BusyBox is extremely configurable. This allows you to include only the components you need, thereby
reducing binary size. Run 'make config' or 'make menuconfig' to select the functionality that you wish to
enable. Then run 'make' to compile BusyBox using your configuration.
After the compile has finished, you should use 'make install' to install BusyBox. This will install the 'bin/
busybox' binary, in the target directory specified by CONFIG_PREFIX. CONFIG_PREFIX can be set when
configuring BusyBox, or you can specify an alternative location at install time (i.e., with a command line like
'make CONFIG_PREFIX=/tmp/foo install'). If you enabled any applet installation scheme (either as symlinks
or hardlinks), these will also be installed in the location pointed to by CONFIG_PREFIX.
USAGE
BusyBox is a multi-call binary. A multi-call binary is an executable program that performs the same job as
more than one utility program. That means there is just a single BusyBox binary, but that single binary acts like
a large number of utilities. This allows BusyBox to be smaller since all the built-in utility programs (we call
them applets) can share code for many common operations.
You can also invoke BusyBox by issuing a command as an argument on the command line. For example, entering
/bin/busybox ls
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