:Berkeley Automounter

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{{Notability|Products|date=September 2011}}

{{primary sources|date=September 2011}}

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{{Infobox software | name = am-utils

| logo =

| screenshot =

| caption =

| developer = Erez Zadok

| latest_release_version = [ftp://ftp.am-utils.org/pub/am-utils/am-utils-6.2.tar.gz 6.2]{{dead link|date=May 2025|bot=medic}}{{cbignore|bot=medic}}

| latest_release_date = Oct 30, 2014

| operating_system = Cross-platform

| genre = NFS Automounter

| license = BSD License

| website = http://www.am-utils.org/

}}

In computing the Berkeley Automounter (or amd) is a computer automounter daemon which first appeared in 4.4BSD in 1994. The original Berkeley automounter was created by Jan-Simon Pendry in 1989 and was donated to Berkeley.{{cite newsgroup

| title = Amd - An Automounter

| author = Jan-Simon Pendry

| date = 1989-12-01

| newsgroup = comp.unix.wizards

| url = https://groups.google.com/group/comp.protocols.nfs/msg/4951e03d27b7c7e2

| accessdate = 2007-12-23

}} After languishing for a few years, the maintenance was picked up by Erez Zadok, who has maintained it since 1993.

The am-utils package which comprises and is included with FreeBSD, NetBSD, and OpenBSD. It is also included with a vast number of Linux distributions, including Red Hat Enterprise Linux, Fedora Core, ASPLinux, Trustix, Mandriva, and others.

The Berkeley automounter has a large number of contributors, including several who worked on the original automounter with Jan-Simon Pendry.

It is one of the oldest and more portable automounters available today, as well as the most flexible and the most widely used.{{Citation needed|date=October 2012}}

Caveats

There are a few "side effects" that come with files that are mounted using automounter, these may differ depending on how the service was configured.

  • Access time of automounted directories is initially set to the time automounter was used to mount them, however after the directories are accessed, this statistic changes.
  • On some systems, directories are not visible until the first time they are used. This means commands such as ls will fail.
  • If mounted directories are not used for a period of time, directories are unmounted.
  • When automounter mounts directories, they are said to be owned by root until someone uses them, at that time the correct owner of the directory shows up.

References

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