12.04 - Upgrade to Ubuntu 14.04.5 LTS Failed - Ask Ubuntu


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i tried update ubuntu 14.04.5 on dell inspiron 8600 running ubuntu 12.02 lts, , received error saying pae not enabled. looked @ support enabling pae on pentium m systems, when tried run command apt-get install linux-image-generic-pae , received error saying: 

e: not open lock file /var/lib/dpkg/lock - open (13: permission denied) e: unable lock administration directory (/var/lib/dpkg/), root?

i've tried find answers in forum, cannot find solution this. there way fix issue? need run superuser?

the "permission denied" error , "are root?" message mean don't have permission apt installs, since need run program root user.

you using sudo in front of apt-get, in:

sudo apt-get install linux-image-generic-pae

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