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Why use grep and awk?
There are 12 alternatives - vote for the best!
Requires sysfs mounted on /sys - may only be useful for Linux systems.
Could also use "printf '%-8s %s\n' $(basename $f) $(cat $f/address)" instead of echo.
No need for the ls -r and a sort is also not really needed.
If you can do better, submit your command here.
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