DEPMOD linux command manual

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]  [filename ...]

       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 mod-
       ules.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.

       -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.

       -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 mod-
                 ules 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  sym-

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

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

       This version of depmod is for kernels 2.5.48 and above.  If it detects
       a kernel with support for old-style modules, or the version  specified
       is  before  2.5.48,  it will use previous modutils code, so it is com-
       pletely transparent to the user.

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

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