depmod man page on aLinux

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DEPMOD(8)							     DEPMOD(8)

       depmod - program to generate modules.dep and map files.

       depmod  [  -b  basedir  ]  [ -e ]  [ -F ]  [ -n ]  [ -v ]  [
       version ]  [ -A ]

       depmod [ -e ]  [ ]	[ -n ]	[ -v ]	[ version ]   [	 file‐
       name... ]

       Linux  kernel modules can provide services (called "symbols") for other
       modules to use (using EXPORT_SYMBOL in the code). If  a	second	module
       uses  this symbol, that second module clearly depends on the first mod‐
       ule. These dependencies can get quite complex.

       depmod creates a list of module dependencies  by	 reading  each	module
       under  /lib/modules/version and determining what symbols it exports and
       what symbols it needs. By default, this list is written to  modules.dep
       in the same directory. If filenames are given on the command line, only
       those modules are examined (which is rarely useful unless  all  modules
       are listed).

       If  a  version is provided, then that kernel version's module directory
       is used rather than the current kernel version (as  returned  by	 uname

       depmod  will  also generate various map files in this directory for use
       by the hotplug infrastructure.

       -a --all
	      Probe all modules. This option is enabled by default if no  file
	      names are given in the command-line.

       -A --quick
	      This  option scans to see if any modules are newer than the mod‐
	      ules.dep file before any work is done: if not, it silently exits
	      rather than regenerating the files.

       -b basedir --basedir basedir
	      If  your	modules	 are  not  currently in the (normal) directory
	      /lib/modules/version, but in a staging area, you can  specify  a
	      basedir  which  is prepended to the directory name. This basedir
	      is stripped from the resulting modules.dep file, so it is	 ready
	      to be moved into the normal location.

       -C --config file or directory
	      This   option   overrides	 the  default  configuration  file  at
	      /etc/depmod.conf (or the /etc/depmod.d/ directory if that is not

       -e --errsyms
	      When combined with the -F option, this reports any symbols which
	      a module needs which are not supplied by other  modules  or  the
	      kernel.  Normally,  any  symbols	not  provided  by  modules are
	      assumed to be provided by the kernel (which should be true in  a
	      perfect world).

       -F --filesyms
	      Supplied with the produced when the kernel was built,
	      this allows the -e option to report unresolved symbols.

       -h --help
	      Print the help message and exit.

       -n --dry-run
	      This sends the resulting modules.dep and the various  map	 files
	      to  standard  output  rather  than  writing them into the module

       -v --verbose
	      In verbose mode, depmod will print (to stdout) all  the  symbols
	      each module depends on and the module's file name which provides
	      that symbol.

       -V --version
	      Show version of program and exit. See below for caveats when run
	      on older kernels.

       This manual page Copyright 2002, Rusty Russell, IBM Corporation.

       depmod.conf(5), modprobe(8), modules.dep(5)

				  2007-03-21			     DEPMOD(8)

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