For crashes while downloading and installing through cli

1. https://askubuntu.com/questions/15433/unable-to-lock-the-administration-directory-var-lib-dpkg-is-another-process

2. https://askubuntu.com/questions/136881/debconf-dbdriver-config-config-dat-is-locked-by-another-process-resource-t

3. https://askubuntu.com/questions/702274/error-while-setting-up-jdk8-on-ubuntu-14-04lts

Virtual Box Installation Error Fix

1. https://websiteforstudents.com/install-virtualbox-latest-on-ubuntu-16-04-lts-17-04-17-10/

2. https://askubuntu.com/questions/900118/vboxdrv-sh-failed-modprobe-vboxdrv-failed-please-use-dmesg-to-find-out-why

3. https://askubuntu.com/questions/760671/could-not-load-vboxdrv-after-upgrade-to-ubuntu-16-04-and-i-want-to-keep-secur

https://askubuntu.com/questions/852590/failed-installation-of-virtualbox-5-1-on-ubuntu-16-04 https://gorka.eguileor.com/vbox-vmware-in-secureboot-linux-2016-update/ https://stegard.net/2016/10/virtualbox-secure-boot-ubuntu-fail/