Since version 40, Opera has offered a built-in VPN solution in their browser: "In April, Opera added a free, unlimited VPN to the developer edition of its browser. Now, the company has brought that same capability to the stable version of its Opera 40 desktop browser."
Drupal has a flood protection feature, which bans a user after a number of failed login attempts:
"Drupal 7 prevents brute force attacks on accounts. It blocks login by a user that has more than 5 failed login attempts (within six hours) or an IP address that has more than 50 failed login attempts (within one hour)."
The Keyword field in Firefox Bookmarks can be used to create shortcuts and smart searches. For some reason, sometimes if you define a new keyword, the latest keyword will be deleted. Keeping track of your keywords is hard though, since there isn't a way to list all keywords in use...
If you want to stop Evolution from running in the background, even if you don't use it, and save some RAM, here is a quick way. Supposedly, you can't un-install it, since other programs depend on it. But by preventing the file from being executed you can prevent it from starting.
Log in as root with sudo -i first, run these commnands, and reboot for it to take effect:
By installing Memcached on your server, you can speed up the load time for your web site pages.
From the official web site: "Free & open source, high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.