The Autofs package contains userspace tools that work with the kernel to mount and un-mount removable file systems. The primary use is to mount external network file systems like NFS (see NFS Utilities-1.1.2) or Samba (see Samba-3.0.30) on demand.
It may also be useful for allowing users to mount floppies, cdroms and other removable storage devices without requiring the system administrator to mount the devices although this capability is now generally provided by HAL (see HAL-0.5.9.1). This may not be ideal for all installations, so be aware of the risks before implementing this feature.
Download MD5 sum: 27839fe6fa8105b2b7d31bc922fd7cf6
Download size: 221 KB
Estimated disk space required: 9 MB
Estimated build time: less than 0.1 SBU
Recommended Patches: There are frequent patches issued for
Autofs. One method you can use to
get the current patches requires first installing the Wget-1.10.2 package. After ensuring the
wget command is
installed in a directory identified in the
PATH variable, start in the same directory as the
main tar file and issue the following commands:
wget http://ftp.kernel.org/pub/linux/daemons/autofs/v5/patch_order-5.0.3 && sed 's;autofs;http://ftp.kernel.org/pub/linux/daemons/autofs/v5/autofs;' \ patch_order-5.0.3 > wget-list && wget -i wget-list
Verify that kernel support has been compiled in or built as modules in the following areas:
File systems ⇒ Kernel automounter version 4 support Y or M Network File Systems ⇒ NFS file system support Y or M (optional) SMB file system support Y or M (optional)
Recompile and install the new kernel, if necessary.
Install Autofs by running the following commands:
for f in `cat ../patch_order-5.0.3`; do patch -Np1 -i ../$f done && ./configure --prefix=/ --mandir=/usr/share/man && make
This package does not come with a test suite.
Now, as the
make install && ln -sf ../init.d/autofs /etc/rc.d/rcsysinit.d/S52autofs
for f in `cat ../patch_order-5.0.3`; do patch -Np1 -i ../$f; done: This command applies all the patches downloaded earlier in the correct order.
ln -sf ../init.d/autofs /etc/rc.d/rcsysinit.d/S52autofs: This command sets the link to properly start autofs upon boot.
The installation process creates
auto.net. Replace the
auto.master file with the following commands:
mv /etc/auto.master /etc/auto.master.bak && cat > /etc/auto.master << "EOF"
# Begin /etc/auto.master /media/auto /etc/auto.misc --ghost #/home /etc/auto.home # End /etc/auto.masterEOF
This file creates a new media directory,
/media/auto that will overlay any existing
directory of the same name. In this example, the file,
/etc/auto.misc, has a line:
cd -fstype=iso9660,ro,nosuid,nodev :/dev/cdrom
that will mount a cdrom as
/media/auto/cd if that directory is accessed.
--ghost option tells the
automounter to create “ghost” versions (i.e. empty directories) of
all the mount points listed in the configuration file regardless
whether any of the file systems are actually mounted or not. This
is very convenient and highly recommended, because it will show
you the available auto-mountable file systems as existing
directories, even when their file systems aren't currently
mounted. Without the
you'll have to remember the names of the directories. As soon as
you try to access one of them, the directory will be created and
the file system will be mounted. When the file system gets
unmounted again, the directory is destroyed too, unless the
--ghost option was given.
An alternative method would be to specify another automount
location such as
/var/lib/auto/cdrom and create a symbolic
/media/cdrom to the
auto.misc file must be
configured to your working hardware. The loaded configuration
file should load your cdrom if
/dev/cdrom is active or it can be edited to
match your device setup. Examples for floppies are available in
the file and easily activated. Documentation for this file is
available using the man 5
In the second line, if enabled, a user's home directory would be
mounted via NFS upon login. The
/etc/home.auto would need to exist and have an
entry similar to:
where the directory
/export/home/joe is exported via NFS from the
system example.org. NFS shares are covered on the next page.
This package could also be used to mount SMB shares, however that feature is not configured in these instructions. For additional configuration information, see the man pages for auto.master(5). There are also web resources such as this AUTOFS HOWTO available.
Last updated on 2008-08-11 15:01:37 -0500