View Source: UDev - Waikato Linux Users Group

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[UDev] is the UserSpace-based replacement for DevFs, an obsolete LinuxKernel [Module] that creates entries for available devices in <tt>/dev</tt>. [UDev] is available in [Kernel] 2.5 and newer and uses HotPlug and the <tt>/sys</tt> FileSystem.

See also:
* [Red Hat Magazine - Configuring Devices with udev | http://www.redhat.com/magazine/002dec04/features/udev/]
* [Writing udev rules|http://www.reactivated.net/udevrules.php]
* [Gentoo Customizing udev HOWTO|http://gentoo-wiki.com/HOWTO_Customizing_UDEV]
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!!Notes
(WikiGnome~s split out to another page if you feel the need)

!! Troubleshooting

__Q:__ Why doesn't the [HAL] and [UDev] combination pick up my device events (ie plugging in a KeyDrive) in DebianLinux?
<br> __A:__ You have to add the user to the "plugdev" group, else it won't work.

!! Force a USB storage device to a specific mount point

DanielLawson writes on the [NZLUG] list:

There are a couple of ways of doing this.

If your distribution uses udev, you can make a udev rule to create a /dev entry for a specific device, based on some criteria. I've used the USB serial #, for example, to map my USB harddisk to /dev/external and my USB flash disk to /dev/memorystick. You can then use normal fstab rules for these mounts.

Another option, which works with most FileSystem~s (not [NTFS] it seems), is to get the UUID of the filesystem, and use that as an fstab(5) rule. If you run the blkid program as root it will list all filesystems present
on your system, and their UUIDs if they are available. You can then add a rule to fstab that looks like:

=UUID=42CB-5356  /media/external  vfat    rw,user,noauto  0       0=

blkid is provided by the libblkid1 package under [Ubuntu] (and [Debian] Sarge, I believe).

These approaches should all integrate reasonably well with the standard automounting facilities available in modern distributions.

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Version 6, saved on Monday, August 22, 2005 8:57:43 am by CraigBox

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