MODPROBE(8)               (08/17/2021)                MODPROBE(8)

     NAME
          modprobe - Add and remove modules from the Linux Kernel

     SYNOPSIS
          modprobe [-v] [-V] [-C config-file] [-n] [-i] [-q] [-b]
                   [modulename] [module parameters...]

          modprobe [-r] [-v] [-n] [-i] [modulename...]

          modprobe [-c]

          modprobe [--dump-modversions] [filename]

     DESCRIPTION
          modprobe intelligently adds or removes a module from the
          Linux kernel: note that for convenience, there is no
          difference between _ and - in module names (automatic
          underscore conversion is performed).  modprobe looks in the
          module directory /lib/modules/`uname -r` for all the modules
          and other files, except for the optional configuration files
          in the /etc/modprobe.d directory (see modprobe.d(5)).
          modprobe will also use module options specified on the
          kernel command line in the form of <module>.<option> and
          blacklists in the form of modprobe.blacklist=<module>.

          Note that unlike in 2.4 series Linux kernels (which are not
          supported by this tool) 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 failure is sometimes accompanied by a kernel message:
          see dmesg(8).

          modprobe expects an up-to-date modules.dep.bin file as
          generated by the corresponding depmod utility shipped along
          with modprobe (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.

          If any arguments are given after the modulename, they are
          passed to the kernel (in addition to any options listed in
          the configuration file).

     OPTIONS
          -a, --all
              Insert all module names on the command line.

          -b, --use-blacklist
              This option causes modprobe to apply the blacklist
              commands in the configuration files (if any) to module
              names as well. It is usually used by udev(7).

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          -C, --config
              This option overrides the default configuration
              directory (/etc/modprobe.d).

              This option is passed through install or remove commands
              to other modprobe commands in the MODPROBE_OPTIONS
              environment variable.

          -c, --showconfig
              Dump out the effective configuration from the config
              directory and exit.

          --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 Linux kernel
              module using module versioning deps.

          -d, --dirname
              Root directory for modules, / by default.

          --first-time
              Normally, modprobe will succeed (and do nothing) if told
              to insert a module which is already present or to remove
              a module which isn't present. This is ideal for simple
              scripts; however, more complicated scripts often want to
              know whether modprobe really did something: this option
              makes modprobe fail in the case that it actually didn't
              do anything.

          --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
              complains that the "version magic" doesn't match, you
              can use this option to remove it. Naturally, this check
              is there for your protection, so using this option is
              dangerous unless you know what you're doing.

              This applies to any modules inserted: both the module
              (or alias) on the command line and any modules on which
              it depends.

          --force-modversion
              When modules are compiled with CONFIG_MODVERSIONS set, a
              section detailing the versions of every interfaced used
              by (or supplied by) the module is created. 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 unless you

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              know what you're doing.

              This applies any modules inserted: both the module (or
              alias) on the command line and any modules on which it
              depends.

          -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
              unless you know what you are doing.

              This applies to any modules inserted: both the module
              (or alias) on the command line and any modules it on
              which it depends.

          -i, --ignore-install, --ignore-remove
              This option causes modprobe to ignore install and remove
              commands in the configuration file (if any) for the
              module specified on the command line (any dependent
              modules are still subject to commands set for them in
              the configuration file). Both install and remove
              commands will currently be ignored when this option is
              used regardless of whether the request was more
              specifically made with only one or other (and not both)
              of --ignore-install or --ignore-remove. See
              modprobe.d(5).

          -n, --dry-run, --show
              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. For historical reasons both --dry-run and
              --show actually mean the same thing and are
              interchangeable.

          -q, --quiet
              With this flag, modprobe won't print an error message if
              you try to remove or insert a module it can't find (and
              isn't an alias or install/remove command). However, it
              will still return with a non-zero exit status. The
              kernel uses this to opportunistically probe for modules
              which might exist using request_module.

          -R, --resolve-alias
              Print all module names matching an alias. This can be
              useful for debugging module alias problems.

          -r, --remove
              This option causes modprobe to remove rather than insert

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              a module. If the modules 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 distribution kernel may
              not have been built to support removal of modules at
              all.

          -S, --set-version
              Set the kernel version, rather than using uname(2) to
              decide on the kernel version (which dictates where to
              find the modules).

          --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" and is typically used by distributions to
              determine which modules to include when generating
              initrd/initramfs images.  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.

          -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.

          -V, --version
              Show version of program and exit.

          -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.

     ENVIRONMENT
          The MODPROBE_OPTIONS environment variable can also be used

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          to pass arguments to modprobe.

     COPYRIGHT
          This manual page originally Copyright 2002, Rusty Russell,
          IBM Corporation. Maintained by Jon Masters and others.

     SEE ALSO
          modprobe.d(5), insmod(8), rmmod(8), lsmod(8), modinfo(8)
          depmod(8)

     AUTHORS
          Jon Masters <jcm@jonmasters.org>
              Developer

          Robby Workman <rworkman@slackware.com>
              Developer

          Lucas De Marchi <lucas.de.marchi@gmail.com>
              Developer

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