install issue with vagrant

[samuelgortiz]

I am a newbie. Hopefully someone can assist. thanks in advance

GPG error: http://ppa.launchpad.net trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5BB92C09DB82666C
local: WARNING: The following packages cannot be authenticated!
python2.7 libpython2.7 libpython2.7-stdlib python2.7-minimal
local: libpython2.7-minimal
local: E
local: :
local: There are problems and -y was used without --force-yes
local: deployment/ansible.sh: line 52: pip: command not found
local: Python 2.7.6
local: Running Ansible provisioner defined in Vagrantfile.
local: deployment/ansible.sh: line 76: ansible-playbook: command not found
The SSH command responded with a non-zero exit status. Vagrant
assumes that this means the command failed. The output for this command
should be in the log above. Please read the output to determine what
went wrong.