Vagrant installation script is not working on ubuntu_14.04 (64-bit)

[samodk]

Hello,

When I run './install_vagrant.sh' script on my machine which is using ubuntu 14.04 64-bit I get following error. I exported proxy also

Output :-

./install_vagrant.sh
http://vlabcse:vlabcse@202.141.80.30:3128
http://vlabcse:vlabcse@202.141.80.30:3128
Uninstalling Vagrant
Uninstalling virtual box
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package virtualbox-4.3
E: Couldn't find any package by regex 'virtualbox-4.3'
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 564 not upgraded.
gpg: no valid OpenPGP data found.

Install Virtual Box

Err http://in.archive.ubuntu.com trusty InRelease

Err http://in.archive.ubuntu.com trusty-updates InRelease

Err http://in.archive.ubuntu.com trusty-backports InRelease

Err http://security.ubuntu.com trusty-security InRelease

Err http://extras.ubuntu.com trusty InRelease

Err http://download.virtualbox.org trusty InRelease

Err http://in.archive.ubuntu.com trusty Release.gpg
Could not resolve 'in.archive.ubuntu.com'
Err http://in.archive.ubuntu.com trusty-updates Release.gpg
Could not resolve 'in.archive.ubuntu.com'
Err http://security.ubuntu.com trusty-security Release.gpg
Could not resolve 'security.ubuntu.com'
Err http://download.virtualbox.org trusty Release.gpg
Could not resolve 'download.virtualbox.org'
Err http://extras.ubuntu.com trusty Release.gpg
Could not resolve 'extras.ubuntu.com'
Err http://in.archive.ubuntu.com trusty-backports Release.gpg
Could not resolve 'in.archive.ubuntu.com'
Err http://ppa.launchpad.net trusty InRelease

Err http://ppa.launchpad.net trusty Release.gpg
Could not resolve 'ppa.launchpad.net'
Reading package lists... Done
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty/InRelease

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty-updates/InRelease

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty-backports/InRelease

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/InRelease

W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/trusty/InRelease

W: Failed to fetch http://download.virtualbox.org/virtualbox/debian/dists/trusty/InRelease

W: Failed to fetch http://ppa.launchpad.net/git-core/ppa/ubuntu/dists/trusty/InRelease

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty/Release.gpg Could not resolve 'in.archive.ubuntu.com'

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty-updates/Release.gpg Could not resolve 'in.archive.ubuntu.com'

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty-backports/Release.gpg Could not resolve 'in.archive.ubuntu.com'

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/Release.gpg Could not resolve 'security.ubuntu.com'

W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/trusty/Release.gpg Could not resolve 'extras.ubuntu.com'

W: Failed to fetch http://download.virtualbox.org/virtualbox/debian/dists/trusty/Release.gpg Could not resolve 'download.virtualbox.org'

W: Failed to fetch http://ppa.launchpad.net/git-core/ppa/ubuntu/dists/trusty/Release.gpg Could not resolve 'ppa.launchpad.net'

W: Some index files failed to download. They have been ignored, or old ones used instead.
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package virtualbox-4.3
E: Couldn't find any package by regex 'virtualbox-4.3'

Error executing ( sudo apt-get install -y virtualbox-4.3 ). Quitting!