HP-UX Reference (11i v1 00/12) - 1M System Administration Commands A-M (vol 3)

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STANDARD Printed by: Nora Chuang [nchuang] STANDARD

/build/1111/BRICK/man1m/!!!intro.1m

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automount(1M) automount(1M)

(automounter)

The -null map, when indicated on the command line, cancels a previous map for the directory indicated.

It can be used to cancel a map given in auto_master .

Conﬁguration and the auto_master Map

automount normally consults the auto_master conﬁguration map for a list of initial automount

maps, and sets up automatic mounts for them in addition to those given on the command line. If there are

duplications, the command-line arguments take precedence. This conﬁguration database contains argu-

ments to the automount command rather than mappings.

Maps given on the command line, or those given in a local master ﬁle speciﬁed with -f override those in

the auto_master map. For example, given the command:

automount /homes /etc/auto.homes /- /etc/auto.direct

and the master map ﬁle auto_master containing:

/homes -passwd

automount

mounts home directories using the /etc/auto.homes map instead of the special -

passwd

map in addition to the various directories speciﬁed in the /etc/auto.direct map.

EXTERNAL INFLUENCES

Environment Variables

Environment variables can be used within an automount map. For example, if $HOME appears within

a map,

automount expands it to the current value of the HOME environment variable.

To protect a reference from afﬁxed characters, surround the variable name with curly braces. Environment

variables cannot appear as the key entry in maps.

WARNINGS

Do not send the SIGKILL signal (kill -9,orkill -KILL) to the automount

daemon. Doing so

causes any processes accessing mount directories served by

automount to hang. A system reboot may be

required to recover from this state.

Do not start an automount daemon while another is still running. If restarting automount, make

sure the ﬁrst daemon and all of its children are not running.

When

automount receives signal SIGHUP, it rereads the /etc/mnttab ﬁle to update its internal

record of currently mounted ﬁle systems. If a ﬁle system mounted by automount is unmounted by a

umount command, automount should be forced to reread the ﬁle by sending the SIGHUP signal (see

kill(1)).

Shell ﬁle name expansion does not apply to objects not currently mounted.

Since

automount is single-threaded, any request that is delayed by a slow or nonresponding NFS server

delays all subsequent automatic mount requests until it completes.

Programs that read /etc/mnttab and then touch ﬁles that reside under automatic mount points intro-

duce further entries to the ﬁle.

Automatically-mounted ﬁle systems are mounted with type ignore; they do not appear in the output of

either mount or bdf (see mount(1M) and bdf(1M)).

AUTHOR

automount was developed by Sun Microsystems, Inc.

FILES

/tmp_mnt directory under which ﬁlesystems are dynamically mounted

/etc/mnttab mount table

/etc/nsswitch.conf the name service switch conﬁguration ﬁle.