I tried this $ sudo apt-key update $ sudo apt-get update Then $ sudo apt-get install packagename
Source: https://askubuntu.com/questions/75565/why-am-i-getting-authentication-errors-for-packages-from-an-ubuntu-repository accessed 10-19-15
I tried this $ sudo apt-key update $ sudo apt-get update Then $ sudo apt-get install packagename
Source: https://askubuntu.com/questions/75565/why-am-i-getting-authentication-errors-for-packages-from-an-ubuntu-repository accessed 10-19-15