# automount

## NAME



           automount - manage autofs mount points
    


## SYNOPSIS



           **automount**[_options_] [_master_map_]
    


## DESCRIPTION



           The **automount** program is used to manage mount points for autofs,
           the inlined Linux automounter.  **automount** works by reading the
           auto.master(5) map and sets up mount points for each entry in the
           master map allowing them to be automatically mounted when ac‐
           cessed. The file systems are then automatically umounted after a
           period of inactivity.
    


## OPTIONS



           _-h, --help_
                  Print brief help on program usage.
    
           _-p, --pid-file_
                  Write the pid of the daemon to the specified file.
    
           _-t <seconds>, --timeout <seconds>_
                  Set the global minimum timeout, in seconds, until directo‐
                  ries are unmounted. The default is 10 minutes. Setting the
                  timeout to zero disables umounts completely.  The internal
                  program default is 10 minutes, but the default installed
                  configuration overrides this and sets the timeout to 5 min‐
                  utes to be consistent with earlier autofs releases.
    
           _-M <seconds>, --master-wait <seconds>_
                  Set the maximum time to wait for the master map to become
                  available if it cannot be read at program start.
    
           _-n <seconds>, --negative-timeout <seconds>_
                  Set the default timeout for caching failed key lookups. The
                  default is 60 seconds.
    
           _-v, --verbose_
                  Enables logging of general status and progress messages for
                  all autofs managed mounts.
    
           **-d**[_LEVEL_], **--debug**[=_LEVEL_]
                  Enables logging of general status and progress messages as
                  well as debugging messages for all autofs managed mounts.
                  The default _LEVEL_ is 0.  automounter must perform OpenLDAP
                  authenticated binds for optional argument _LEVEL_ to have any
                  effect. OpenLDAP uses a bitmap to enable debugging for spe‐
                  cific components. Debug _LEVEL_ =0 disables libldap deugging.
                  For further details see slapd(8).
    
           _-Dvariable=value, --define variable=value_
                  Define a global macro substitution variable. Global defini‐
                  tions are over-ridden macro definitions of the same name
                  specified in mount entries.
    
           _-S, --systemd-service_
                  Used when running the automounter as a systemd service to
                  ensure log entry format is consistent with the log entry
                  format when running as a daemon.
    
           _-f, --foreground_
                  Run the daemon in the foreground and log to stderr instead
                  of syslog."
    
           _-r, --random-multimount-selection_
                  Enables the use of random selection when choosing a host
                  from a list of replicated servers.
    
           _-m, --dumpmaps [ <map type> <map name>]_
                  With no parameters, list information about the configured
                  automounter maps, then exit.
    
                  If the dumpmaps option is given and is followed by two pa‐
                  rameters, "<map type> <map name>" then simple "<key, val‐
                  ue>" pairs that would be read in by a map read are printed
                  to stdout if the given map type and map name are found in
                  the map configuration.
    
                  If the map is an LDAP map and there is more than one map of
                  same name in different base dns only the first map encoun‐
                  tered by autofs will be listed. Similarly, if the map is a
                  file map and there is more than one map of the same name in
                  different directories, only the first map encountered will
                  be listed.
    
                  If the map type is an old style multi-map and any one of
                  the map names in the multi-map entry matches the given map
                  name the entries that would be used by autofs for the whole
                  multi-map will be listed.
    
           _-O, --global-options_
                  Allows the specification of global mount options used for
                  all master map entries. These options will either replace
                  or be appended to options given in a master map entry de‐
                  pending on the APPEND_OPTIONS configuration setting.
    
           _-V, --version_
                  Display the version number, then exit.
    
           _-l, --set-log-priority priority path [path,...]_
                  Set the daemon log priority to the specified value.  Valid
                  values include the numbers 0-7, or the strings emerg,
                  alert, crit, err, warning, notice, info, or debug. Log lev‐
                  el debug will log everything, log levels info, warn (or
                  warning), or notice with enable the daemon verbose logging.
                  Any other level will set basic logging. Note that enabling
                  debug or verbose logging in the autofs global configuration
                  will override dynamic log level changes. For example, if
                  verbose logging is set in the configuration then attempting
                  to set logging to basic logging, by using alert, crit, err
                  or emerg won't stop the verbose logging. However, setting
                  logging to debug will lead to everything (debug logging)
                  being logged witch can then also be disabled, returning the
                  daemon to verbose logging. This option can be specified to
                  change the logging priority of an already running automount
                  process.
    
                  The _path_ argument corresponds to the automounted path name
                  as specified in the master map.
    
           _-C, --dont-check-daemon_
                  Don't check if the daemon is currently running (see NOTES).
    
           _-F, --force_
                  Force an unlink umount of existing mounts under configured
                  autofs managed mount points during startup. This can cause
                  problems for processes with working directories within
                  these mounts (see NOTES).
    
           _-U, --force-exit_
                  Force an unlink umount of existing mounts under configured
                  autofs managed mount points and exit rather than continuing
                  the startup. This can cause problems for processes with
                  working directories within these mounts (see NOTES).
    


## ARGUMENTS



           **automount** takes one optional argument, the name of the master map
           to use.
    
           **master_map**
                  Location for autofs master map that defines autofs managed
                  mount points and the mount maps they will use. The default
                  is **auto.master**.
    


## NOTES



           If the **automount** daemon catches a USR1 signal, it will umount all
           currently unused autofs managed mounted file systems and continue
           running (forced expire).  If it catches the TERM signal it will
           umount all unused autofs managed mounted file systems and exit if
           there are no remaining busy file systems. If autofs has been com‐
           piled with the option to ignore busy mounts on exit it will exit
           leaving any busy mounts in place otherwise busy file systems will
           not be umounted and autofs will not exit.  Alternatively, if aut‐
           ofs has been compiled with the option to enable forced shutdown
           then a USR2 signal to the daemon will cause all mounts to be
           umounted and any busy mounts to be forcibly umounted, including
           autofs mount point directories (summary execution). Note that the
           forced umount is an unlink operation and the actual umount will
           not happen in the kernel until active file handles are released.
           The daemon also responds to a HUP signal which triggers an update
           of the maps for each mount point.
    
           If any autofs mount point directories are busy when the daemon is
           sent an exit signal the daemon will not exit. The exception to
           this is if autofs has been built with configure options to either
           ignore busy mounts at exit or force umount at exit. If the ignore
           busy mounts at exit option is used the filesystems will be left in
           a catatonic (non-functional) state and can be manually umounted
           when they become unused. If the force umount at exit option is
           used the filesystems will be umounted but the mount will not be
           released by the kernel until they are no longer in use by the
           processes that held them busy.  If automount managed filesystems
           are found mounted when autofs is started they will be recovered
           unless they are no longer present in the map in which case they
           need to umounted manually.
    
           If the option to disable the check to see if the daemon is already
           running is used be aware that autofs currently may not function
           correctly for certain types of automount maps. The mounts of the
           separate daemons might interfere with one another. The implica‐
           tions of running multiple daemon instances needs to be checked and
           tested before we can say this is supported.
    
           If the option to force an unlink of mounts at startup is used then
           processes whose working directory is within unlinked automounted
           directories will not get the correct pwd from the system. This is
           because, after the mount is unlinked from the mount tree, anything
           that needs to walk back up the mount tree to construct a path,
           such as getcwd(2) and the proc filesystem /proc/<pid>/cwd, cannot
           work because the point from which the path is constructed has been
           detached from the mount tree.
    


## BUGS



           Don't know, I've fixed everything I know about.
    
           The documentation could be better.
    
           Please report other bugs along with a detailed description to
           <autofs@vger.kernel.org>. Visit
           http://vger.kernel.org/vger-lists.html#autofs for information
           about the list.
    


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