How to install Drush in CentOS Linux for Drupal Development?

This command has been successfully tested on Debian, Ubuntu, CentOS and should work for most *NIX systems.

sudo wget --quiet -O - http://ftp.drupal.org/files/projects/drush-7.x-4.5.tar.gz | sudo tar -zxf - -C /usr/local/share
sudo ln -s /usr/local/share/drush/drush /usr/local/bin/drush
sudo drush
The last line is for Drush to auto download the required library. If it displays a list of drush command, it means drush was installed successfully. Some machines might not have the right folders created, so either update the paths above to match your environment, or create them beforehand using this command.
sudo mkdir /usr/local/share/
sudo mkdir /usr/local/bin/