VirtualBox for Fedora Linux

https://www.virtualbox.org/wiki/Downloads

# cd /etc/yum.repos.d/
# wget http://download.virtualbox.org/virtualbox/rpm/fedora/virtualbox.repo 

# yum install VirtualBox

Note: tested on Fedora 19. Use generic VirtualBox as keyword

because some versions of Virtual Box may not have support for our kernel.

Vi Tricks

http://stackoverflow.com/questions/235839/indent-multiple-lines-quickly-in-vi

Installing Google Chrome on CentOS 7.0 / 6.x

Create /etc/yum.repos.d/google-chrome.repo

Check if latest version of Chrome available from Google's repository by
# yum info google-chrome-stable

# yum install google-chrome-stable
This will fail.

Sadly, the Google Chrome browser no longer supports the most famous commercial distribution RHEL 6.x and its free clones such as CentOS and Scientific Linux.

However, there's this script by Richard Lloyd that

automatically download and install latest Google Chrome browser by picking libraries from a more recent released distro and put those libraries in (/opt/google/chrome/lib) directory and then you can able to run Google Chrome on RHEL/CentOS 6.x versions.

# wget http://chrome.richardlloyd.org.uk/install_chrome.sh

# chmod u+x install_chrome.sh

# ./install_chrome.sh


References
http://www.tecmint.com/install-google-chrome-on-redhat-centos-fedora-linux/