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Disk encryption is an important security measure for any organization. No matter how good your firewall or antivirus software are, if your data is not encrypted then it’s open to being stolen by anyone with access to the computer. As such, you should always use disk encryption on all of your computers and servers that store sensitive information. There are many ways to encrypt your hard drive, but in this post we will discuss one of the most popular methods: open source disk encryption.
The first step to encrypting your hard drive is installing encryption software. This can be done manually or via a package manager, but the most popular open source disk encryption program today is TrueCrypt. To install it on Ubuntu, just open up Terminal and enter: sudo apt-get install truecrypt