/usr/share/doc/autofs/README.v5.release is in autofs 5.0.8-2+deb8u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Differences between version 4 and version 5.
- Master map is now read and parsed by the `automount' daemon
- the parameters for the `automount' daemon are now very different.
See automount(8).
- The master map default is "auto.master" and nsswitch is used to
locate it. The line "+auto.master" has been added to the default
installed "/etc/auto.master" to ensure that those using NIS will
still find their master map. This is in line with other industry
automount implementations. The name of the default master map can
be overridden by setting the MASTER_MAP_NAME configuration variable.
- The `automount' daemon is now a multi-threaded application and so
appears as a single process (unless a thread process display option
is used).
- `autofs' filesystem mounts only appear in /proc/mounts and not
/etc/mtab. If you have a large number of entries in a direct mount
map and link /etc/mtab to /proc/mounts you may see performance
degradation.
- `autofs' version 5.0.0 will refuse to run if it cannot find an
autofs4 kernel module that supports protocol version 5.00 or above.
- mount options present in the master map are now overridden by mount
options in map entries instead of being accumulated. This behaviour
is in line with other industry automount implementations.
New in 5.0.0 is:
- improved direct mount map support
- single level map entries now work as expected.
- top level directory of direct mount hierarchy no longer obscures
directory tree below.
- `+' map inclusion
- maps preceded by a `+' in file maps may now be included inline.
- implemented for the master map and mount maps.
- added nsswitch map source support
- is now used to locate maps if no map source is given in their
specification.
- is used for both master map and mount maps.
- rewrote multi-mount map code
- multi-mount map entry offsets now mount and expire independently
instead of having to mount and umount all offset entries at once.
- added LDAP encryption and authentication support
- needs to be enabled using a configure option.
- a configuration file specifies whether encryption and authentication
is to be used (see INSTALL and auto.master(5) for more information).
- improved shutdown and restart
- needs to be enabled using a configure option.
- see INSTALL for more information.
- a "hosts" map module has been added
- an entry like "/net -hosts" is now understood and uses the new
multi-mount semantics for lazy mount/umount of exports from the host.
- the implementation is quite simple minded at this stage and will need
refinement. It just iterates through the host table and adds any host
names it finds to the internal map.
Things not yet done
===================
- I have no way to test the Gentoo setup here anymore so it is unlikely
to work. Patches from anyone who needs this are welcome.
Ian
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