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Every time I try to update I get the following error, can someone help me?

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usually this one is resolved by logging out/logging in or rebooting ... are you saying this still occurs after doing these actions? –  fossfreedom May 29 '12 at 21:57
    
Yes I have rebooted multiple times. –  TheX May 29 '12 at 21:59
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1 Answer

up vote 5 down vote accepted

If there's no other package manager running (look for muon, apper, synaptic, etc.) then you may simply remove the lock file and retry:

sudo rm /var/lib/dpkg/lock
sudo apt-get update
sudo apt-get upgrade

Since you say you just rebooted, there shouldn't be a package manager running. Just be careful, if there is a package manager running, this brute-force approach may cause serious issues.

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