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I'm trying to fix my screen brightness problem, and I have checked some answers given on this site. I found out that I may have to use some command like this:

ls -la /sys/class/backlight/intel_backlight/ > lslabacklight

The problem is, while running this either with sudo or entered as super user su, I get an error saying permission is denied.

sudo ls -la /sys/calss/backlight/intel_backlight/ > lslbacklight
bash: lslbacklight: Permission denied

How do I make it work? I got the idea of doing this from here.

cat
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senaps
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  • Which directory are you in? Also, does this file already exist? If yes, who owns it? – s3lph Jan 02 '16 at 21:55
  • yes it exists and root owns it. i tried it using root user (su) but had the same error – senaps Jan 02 '16 at 21:57
  • Are you actually in an rooted shell or are you using sudo? Does it work with sudo ls -la /sys/calss/backlight/intel_backlight/ | sudo tee lslbacklight? – s3lph Jan 02 '16 at 21:58
  • i get an access denied for tee and No such file for ls. but i have confirmed and checked that i have intel_backlight – senaps Jan 02 '16 at 22:02
  • My bad, I mistyped the path in my comment (calss instead of class). As for the other problem, what does ls -l lslbacklight print? – s3lph Jan 02 '16 at 22:05
  • lrwxrwxrwx 1 root root – senaps Jan 02 '16 at 22:12

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