Skip to main content


Showing posts from September, 2013

Introducing OpenPGP keys (launchpad and ubuntu)

An OpenPGP (also called GnuPrivacyGuard) key allows you to sign documents, such as emails or text files, using a digital key.There are two parts to an OpenPGP key: one public that you share with the world and the other private, which you should guard closely. Both are standard text files that make up a digital signature. In Launchpad, you can use your OpenPGP key to identify yourself when using the bug tracker's email interface, when uploading distribution packages and when signing a code of conduct. Generating your key in Ubuntu (using Seahorse or others) Generating an OpenPGP Key The core package required to start using OpenPGP,  gnupg , is installed by default on Ubuntu systems, as is seahorse, a GNOME application for managing keys. It is called "Passwords and Keys" in Ubuntu. There are several programs which provide a graphical interface to the GnuPG system. Enigmail , an OpenPGP plugin for Mozilla Thunderbird. Enigmail was available in the "Main&

Virtual user et alis dans postfix

Postfix is a great mailer, but if you're new to administering Postfix, finding your way around can be difficult. For example, just finding information on adding users to a Postfix system can be quite a trial. Postfix is a great mailer, but if you're new to administering it, finding your way around can be difficult. Here's how to get started. In part, this is because Postfix can be set up in a number of ways. Some installations use Postfix alone, others use Postfix in conjunction with other apps and store user information in MySQL. You can have users who have actual accounts on a system, or you can have users on virtual domains that don't have a login but still receive mail. Or you might want aliases that include several users, so everybody on the "marketing" list gets mail or all folks in sales, legal or development can receive messages. For this tip, I'll assume that you've inherited a Postfix domain and want a way to add users or aliases quickly.