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Possible Duplicate:
How do I fix a download issue when updating?

I downloaded Ubuntu 12.04 and installed it in a VMware workstation. and I've been using all the installation commands:

sudo apt-get install automake
sudo apt-get install libboost-all-dev

and some others, but it kept on saying:

E: unable to locate package automake
E: unable to locate package libboost-all-dev

what could be the problem?

1 Answers1

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sudo apt-get update
sudo apt-get install automake
sudo apt-get install libboost-all-dev