Note in newer kernels, there are now *two colons* in the path name to the 'sys' file:
falken@wopr:~/newer-kernel$ uname -a
Linux wopr 2.6.30-020630rc2-generic #020630rc2 SMP Wed Apr 15 14:00:27 UTC 2009 i686 GNU/Linux
falken@wopr:~/newer-kernel$ ls /sys/class/leds/iwl-phy0\:\:radio/trigger
/sys/class/leds/iwl-phy0::radio/trigger
Note in newer kernels, there are now *two colons* in the path name to the 'sys' file: wopr:~/ newer-kernel$ uname -a 020630rc2- generic #020630rc2 SMP Wed Apr 15 14:00:27 UTC 2009 i686 GNU/Linux wopr:~/ newer-kernel$ ls /sys/class/ leds/iwl- phy0\:\ :radio/ trigger leds/iwl- phy0::radio/ trigger
falken@
Linux wopr 2.6.30-
falken@
/sys/class/