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I cannot install aptitude tool on ubuntu 16.4. Whenever I try installing it, an error comes up as follows:

E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

What does this mean and how do I solve this??

troylatroy
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Ujal Dewan
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1 Answers1

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You need to write sudo before your installation. And then enter you password to install aptitude tool.

Oskar
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