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CF Web>Linux>Udev (2008-03-06, WalterTautz) (raw view)

-- Main.MikeGore - 13 Feb 2008
---+ Udev
%TOC%
*Notes on using and understanding Udev* <br />

---++ External References
   * [[http://www.reactivated.net/writing_udev_rules.html][Writing Udev Rules]]
   * [[http://www.kernel.org/pub/linux/utils/kernel/hotplug/udev-FAQ][Udev FAQ]]

---++ Usefull commands
   * *udevinfo* - list all of the KERNELS,SUBSYSTEMS,DRIVERS and     ATTRS for a device
      * Example *udevinfo -a -p /sys/class/net/eth1*
   * *udevtest* - test what actions will be done for a device
      * Example *udevtest /sys/class/net/eth1*

---++ Networking
*Notes: Udev Rules* replace the */etc/iftab* method of matching MAC addresses to device names. (Udev used to read */etc/iftab* and make a matching Udev rule set). Now Udev just skips the extra */etc/iftab* file and directly matches MAC's 
   * *ifconfig -a* - list all network devices detected on your system
   * Files located under */etc/udev/rules.d*
      * *70-persistent-net.rules* - assign network cards to device names - *Note CASE MATTERS* when matching a MAC - use udevinfo!
         * *Note* if you are having problems detecting your networks then deleted the contents of this file and reboot - it is automattically generated
      * *75-persistent-net-generator.rules* - detect new or changed network cards and update *70-persistent-net.rules*
      * *85-ifupdown.rules* - bring up or down network devices marked *auto*
      * *90-modprobe.rules* - load network modules if needed

Topic revision: r2 - 2008-03-06 - WalterTautz

Information in this area is meant for use by CSCF staff and is not official documentation, but anybody who is interested is welcome to use it if they find it useful.

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