Not able to install Ethereum (GETH) on Ubuntu 14.04 (running on Oracle VM VirtaulBox)

Hi,

I tried installing GETH through following ways, but none was successful;

1. bash <(curl https://install-geth.ethereum.org -L)
Got error: Verifying installation
Geth is missing
Installation failed

2. sudo add-apt-repository -y ppa:ethereum/ethereum
Got error: annot add PPA: 'ppa/ethereum/ethereum' Please Check that PPA name or format is correct.

Have updated the ca-certificates using 'sudo apt-get install --reinstall ca-certificates', but still the above command (2) is not working.

Please let me know how to proceed


Regards
Anuj