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I am new to ubuntu.
I am getting an error whenever i try to run sudo apt-get update(407 Proxy authentication required). Moreover, i am unable to install any software from ubuntu software centre not even using sudo apt-get install. I have tried every answers mentioned in the related questions here but none of them worked for me.
When i try to play any audio file i am getting following error:
Required plugin could not be found Python (v2.7) required to install plugins to play media files of the following type: MPEG-1 Layer 3 (MP3) decoder
For this when i try to run: sudo apt-get install ubuntu-restricted-extras, again i am getting error: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package ubuntu-restricted-extras
I have been trying this since the last 2-3 days with no fruitful result.