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modprobe(8) modprobe(8)
NAME
modprobe -- program to add and remove modules from the Linux Kernel
SYNOPSIS
modprobe [-v] [-V] [-C config-file] [-n] [-i] [-q] [-o modulename] [modulename]
[module parameters ...]
modprobe [-r] [-v] [-n] [-i] [modulename ...]
modprobe [-l] [-t dirname] [wildcard]
modprobe [-c]
modprobe [--dump-modversions]
Description
modprobe intelligently adds or removes a module from the Linux kernel: note that for con-
venience, there is no difference between _ and - in module names. modprobe looks in the
module directory /lib/modules/`uname -r` for all the modules and other files, except for
the optional /etc/modprobe.conf configuration file and /etc/modprobe.d directory (see mod-
probe.conf(5)). All files in the /etc/modprobe.d/arch/ directory are ignored.
Note that this version of modprobe does not do anything to the module itself: the work of
resolving symbols and understanding parameters is done inside the kernel. So module fail-
ure is sometimes accompanied by a kernel message: see dmesg(8).
modprobe expects an up-to-date modules.dep file, as generated by depmod (see depmod(8)).
This file lists what other modules each module needs (if any), and modprobe uses this to
add or remove these dependencies automatically. See modules.dep(5)).
If any arguments are given after the modulename, they are passed to the kernel (in addi-
tion to any options listed in the configuration file).
OPTIONS
-v --verbose
Print messages about what the program is doing. Usually modprobe only prints
messages if something goes wrong.
This option is passed through install or remove commands to other modprobe
commands in the MODPROBE_OPTIONS environment variable.
-C --config
This option overrides the default configuration file (/etc/modprobe.conf or
/etc/modprobe.d/ if that isn't found).
This option is passed through install or remove commands to other modprobe
commands in the MODPROBE_OPTIONS environment variable.
-c --showconfig
Dump out the configuration file and exit.
-n --dry-run
This option does everything but actually insert or delete the modules (or run
the install or remove commands). Combined with -v, it is useful for debugging
problems.
-i --ignore-install --ignore-remove
This option causes modprobe to ignore install and remove commands in the config-
uration file (if any), for the module on the command line (any dependent modules
are still subject to commands set for them in the configuration file). See mod-
probe.conf(5).
-q --quiet
Normally modprobe will report an error if you try to remove or insert a module
it can't find (and isn't an alias or install/remove command). With
this flag, modprobe will simply ignore any bogus names (the kernel uses
this to opportunistically probe for modules which might exist).
-r --remove
This option causes modprobe to remove, rather than insert a module. If the mod-
ules it depends on are also unused, modprobe will try to remove them, too.
Unlike insertion, more than one module can be specified on the command line (it
does not make sense to specify module parameters when removing modules).
There is usually no reason to remove modules, but some buggy modules require it.
Your kernel may not support removal of modules.
-w --wait This option is applicable only with the -r or --remove option. It causes mod-
probe to block in the kernel (within the kernel module handling code itself)
waiting for the specified modules' reference count to reach zero. Default opera-
tion is for modprobe to operate like rmmod, which exits with EWOULDBLOCK if the
modules reference count is non-zero.
-V --version
Show version of program, and exit. See below for caveats when run on older ker-
nels.
-f --force
Try to strip any versioning information from the module, which might otherwise
stop it from loading: this is the same as using both --force-vermagic and
--force-modversion. Naturally, these checks are there for your protection, so
using this option is dangerous.
This applies to any modules inserted: both the module (or alias) on the command
line, and any modules it depends on.
--force-vermagic
Every module contains a small string containing important information, such as
the kernel and compiler versions. If a module fails to load and the kernel com-
plains that the "version magic" doesn't match, you can use this option to remove
it. Naturally, this check is there for your protection, so this using option is
dangerous.
This applies to any modules inserted: both the module (or alias) on the command
line, and any modules it depends on.
--force-modversion
When modules are compiled with CONFIG_MODVERSIONS set, a section is created
detailing the versions of every interface used by (or supplied by) the module.
If a module fails to load and the kernel complains that the module disagrees
about a version of some interface, you can use "--force-modversion" to remove
the version information altogether. Naturally, this check is there for your
protection, so using this option is dangerous.
This applies any modules inserted: both the module (or alias) on the command
line, and any modules it depends on.
-l --list List all modules matching the given wildcard (or "*" if no wildcard is given).
This option is provided for backwards compatibility: see find(1) and basename(1)
for a more flexible alternative.
-a --all Insert all module names on the command line.
-t --type Restrict -l to modules in directories matching the dirname given. This option
is provided for backwards compatibility: see find(1) and basename(1) or a
more flexible alternative.
-s --syslog
This option causes any error messages to go through the syslog mechanism (as
LOG_DAEMON with level LOG_NOTICE) rather than to standard error. This is also
automatically enabled when stderr is unavailable.
This option is passed through install or remove commands to other modprobe
commands in the MODPROBE_OPTIONS environment variable.
--set-version
Set the kernel version, rather than using uname(2) to decide on the kernel ver-
sion (which dictates where to find the modules). This also disables backwards
compatibility checks (so modprobe.old(8) will never be run).
--show-depends
List the dependencies of a module (or alias), including the module itself. This
produces a (possibly empty) set of module filenames, one per line, each starting
with "insmod". Install commands which apply are shown prefixed by "install".
It does not run any of the install commands. Note that modinfo(8) can
be used to extract dependencies of a module from the module itself, but knows
nothing of aliases or install commands.
-o --name This option tries to rename the module which is being inserted into the kernel.
Some testing modules can usefully be inserted multiple times, but the kernel
refuses to have two modules of the same name. Normally, modules should not
require multiple insertions, as that would make them useless if there were no
module support.
--first-time
Normally, modprobe will succeed (and do nothing) if told to insert a module
which is already present, or remove a module which isn't present. This is back-
wards compatible with the modutils, and ideal for simple scripts. However, more
complicated scripts often want to know whether modprobe really did something:
this option makes modprobe fail for that case.
--dump-modversions
Print out a list of module versioning information required by a module. This
option is commonly used by distributions in order to package up a Linuxx kernel
module using module versioning deps.
--use-blacklist
Apply a matchin blacklist entry also to a request by module name, not only to a
request by an alias.
BACKWARDS COMPATIBILITY
This version of modprobe is for kernels 2.5.48 and above. If it detects a kernel with
support for old-style modules (for which much of the work was done in userspace), it will
attempt to run modprobe.old in its place, so it is completely transparent to the user.
ENVIRONMENT
The MODPROBE_OPTIONS environment variable can also be used to pass arguments to modprobe.
COPYRIGHT
This manual page Copyright 2002, Rusty Russell, IBM Corporation.
SEE ALSO
modprobe.conf(5), lsmod(8), modprobe.old(8)
modprobe(8)
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On Apache
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2012-05-25 23:25 @38.107.179.237 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)