The AutoFS master map file, /etc/auto_master by default, determines the locations of all AutoFS mount-points.
At system startup, the automount command reads
the master map to create the initial set of AutoFS mounts. Subsequent
to system startup, the automount command maybe
run to install AutoFS mounts for new entries in the master map or
a direct map, or to perform unmounts for entries that have been removed
from these maps.
Following is a syntax of an auto_master file:
mount-point map-name [mount-options] |
where:
- mount-point
Directory on which an AutoFS mount is made.
- map-name
Map associated with mount-point specifying locations
of filesystems to mount.
- mount-options
Options that apply to the maps specified by map-name.
If the first field specifies the directory as /-, then the second
field is the name of the direct map. The master map file, like any
other map file, may be distributed by NIS or LDAP by modifying the
appropriate configuration files and removing any existing /etc/auto_master master map file.
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 | NOTE: If the same mount-point is used in two entries, the first entry
is used by the automount command. The second entry
is ignored. |
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You must run the automount command after
you modify the master map or a direct map.
Following is a sample auto_master file:
# Master map for AutoFS
#
#auto_master
#mount-point map-name [mount-options]
/net -hosts -nosuid,nobrowse #Special Map
/home auto_home -nobrowse #Indirect Map
/- /etc/auto_direct #Direct Map
/nfs /etc/auto_indirect #Indirect Map |
The master map is a primary map that defines all other maps.
In this sample, auto_master, the
master map, contains a single entry each for a direct map and a special
map. It also contains a single entry for each top-level indirect map.
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