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          ovs-ctl(8)                    Open vSwitch Manual                   ovs-ctl(8)
          
          
          
          NAME
                 ovs-kmod-ctl - OVS startup helper script for loading kernel modules
          
          SYNOPSIS
                 ovs-kmod-ctl insert
                 ovs-kmod-ctl remove
                 ovs-kmod-ctl help | -h | --help
                 ovs-kmod-ctl --version
                 ovs-kmod-ctl version
          
          DESCRIPTION
                 The ovs-kmod-ctl program is responsible for inserting and removing Open
                 vSwitch kernel modules.  It is not meant to be invoked directly by sys‐
                 tem  administrators  but  to  be  called  internally  by system startup
                 scripts.  The script is used as part of an SELinux transition domain.
          
                 Each of ovs-kmod-ctl's commands is described separately below.
          
          The ``insert'' command
                 The insert command loads the Open vSwitch kernel  modules,  if  needed.
                 If this fails, and the Linux bridge module is loaded but no bridges ex‐
                 ist, it tries to unload the bridge module and tries  loading  the  Open
                 vSwitch kernel module again.
          
          The ``remove'' command
                 The  remove  command  unloads the Open vSwitch kernel module (including
                 the bridge compatibility module, if loaded) and  any  associated  vport
                 modules.
          
          EXIT STATUS
                 ovs-kmod-ctl  exits  with  status  0 on success and nonzero on failure.
                 The insert command is considered to succeed if kernel modules  are  al‐
                 ready  loaded;  the  remove command is considered to succeed if none of
                 the kernel modules are loaded.
          
          ENVIRONMENT
                 The following environment variables affect ovs-kmod-ctl:
          
                 PATH   ovs-kmod-ctl does not hardcode the location of any of  the  pro‐
                        grams  that  it  runs.   ovs-kmod-ctl  will  add the sbindir and
                        bindir that were specified at configure time to  PATH,  if  they
                        are not already present.
          
                 OVS_LOGDIR
                 OVS_RUNDIR
                 OVS_DBDIR
                 OVS_SYSCONFDIR
                 OVS_PKGDATADIR
                 OVS_BINDIR
                 OVS_SBINDIR
                        Setting  one of these variables in the environment overrides the
                        respective configure option, both for  ovs-kmod-ctl  itself  and
                        for the other Open vSwitch programs that it runs.
          
          FILES
                 ovs-kmod-ctl uses the following files:
          
                 ovs-lib
                        Shell function library used internally by ovs-kmod-ctl.  It must
                        be installed in the same directory as ovs-kmod-ctl.
          
          EXAMPLE
                 ovs-kmod-ctl isn't intended to be manually executed.  However, the fol‐
                 lowing examples demonstrate loading the kernel modules.
          
                 ovs-kmod-ctl insert
                        Attempts to insert the Open vSwitch kernel modules.
          
                 ovs-kmod-ctl remove
                        Attempts to remove the Open vSwitch kernel modules.
          
          SEE ALSO
                 README.rst, ovs-ctl(8)
          
          
          
          Open vSwitch                     February 2018                      ovs-ctl(8)
          
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