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I am unable to install php5-dev package in ubuntu 12.10. I am getting the following on sudo apt-get install php5-dev:

 Reading package lists... Done
 Building dependency tree       
 Reading state information... Done
 E: Unable to locate package php5-dev
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2 Answers

I'm not sure that this would work (since apt-get didn't work), but php5-dev is right there in Synaptic where it's supposed to be, so for the sake of completeness install Synaptic Package Manager from the Ubuntu Software Center, search for the php5-dev package in Synaptic, and install php5-dev using Synaptic.

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I just tried installing php5-dev package in Ubuntu 12.10, and I didn't have any problems. It installed fine.

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I'm including images of my software sources, just so you can compare with yours.

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I also suggest the you just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command(s) below prior to installing:

sudo apt-get update && sudo apt-get upgrade
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