Molly-Guard is a command line script which prevents you from accidentally shutting down or rebooting your Ubuntu system.

Scripts are files that contain shell commands which may be short or can be very complex. Scripts just make it easier because you can invoke one command to run all of the commands in the script. Here instead of using 8 separate commands you can use one command to execute all of them.

"It's been a decade now that the very first version of the GNU Privacy Guard has been released. This very first version was not yet known under the name of GnuPG but dubbed "g10" as a reference on the German constitution article on freedom of telecommunication (Grundgesetz Artikel 10) and as a pun on the G-10 law which allows the secret services to bypass these constitutional guaranteed freedoms..."

"The GNU Privacy Guard (GnuPG or GPG) is a free software replacement for the PGP suite of cryptographic software, released under the GNU General Public License. It is a part of the Free Software Foundation’s GNU software project..."

The Bash shell provides a builtin command that allows you to test the exit status of a command to determine if the command was successful or not. The test command provides a way to make decisions about what will happen next in a script.

This isn't about a shell script, it's about a really cool technique to apply in shell scripts. Have you ever been worried about multiple instances of a shell script running because they might overwrite or corrupt the data or devices they are working on? Here's a way to prevent that.

What happens when there's a discrepancy in the vote count of an electronic voting machine? Can outside experts examine it and determine what went wrong? Chances are, the answer is no, because the companies that make the machines jealously guard their proprietary systems.

Getting comfortable with GNU and UNIX commands. GUIs are fine, but to unlock the real power of Linux®, there's no substitute for the command line. In this article, Ian Shields introduces you to some of the major features of the bash shell, with an emphasis on the features that are important for LPI certification.

The GNU Privacy Guard is GNU's tool for secure communication and data storage. It can be used to encrypt data, create digital signatures, help authenticating using Secure Shell and to provide a framework for public key cryptography. It includes an advanced key management facility and is compliant with the OpenPGP and S/MIME standards.