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I have Ubuntu 13.04 installed in my laptop. I tried to upgrade it to the new release Ubuntu 13.10, unfortunately the system hanged up during the upgrade so I need to reboot my laptop. After the reboot i got this

Filesystem check or mount failed. A maintenance shell will now be started. CONTROL-D will terminate this shell and continue booting after re-trying filesystems. Any further errors will be ignored.

I was able to fix the error through the following commands in the terminal:

mount -o remount,rw /
dpkg --configure -a
mount -o remount,ro /

After successfully recovering my Ubuntu 13.04, I can't connect to any available wifi connection. Whenever I try to click any wifi connection, I am getting this error:

Connection activation failed. (32) Not authorized to control networking.

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thank you for the edit –  Harold Oct 24 '13 at 7:39
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