SugarCRM provides easy stack installers which make trying the system as close to a one-click operation as possible. That is great for trying it out.
If you are beyond the exploration stage you will want to install into an existing infrastructure, so we'll assume that approach.
There are some PHP modules that Sugar relies on, so you may want to check for those prior to installing. Sugar is programmed to use the PHP IMAP module for mailing and the PHP CURL module for getting remote files.
<source lang="bash">
php -m | grep -i curl
php -m | grep -i imap
</source>
If those modules are not installed, then you can install them via apt-get
<source lang="bash">
sudo apt-get install php5-curl php5-imap
</source>
# Visit the [http://sugarcrm.com SugarCRM homepage], and click the top navbar link to "Sugar Open Source"
</source>
After the install, I believe you should secure your configuration files with <source lang="bash">
chmod go -rwx config.php .htaccess
</source>