Gpg is stands for Gnu Privacy Guard and is a free alternative to the PGP cryptographic software. GnuPG (or GPG) follows the RFC 4880 which is the standard specification of OpenPGP. The most important thing GPG is interoperable with PGP. GPG is build as a command line utility but also have several front-ends for KDE, Gnome and other Linux desktops, but also is directly integrated in other software like: Email Clients as Mozilla Thunderbird, Evolution, Kmail, Instant Messaging as PSI, Fire, Browsers as Mozilla Firefox etc.

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This days we shouldn’t trust in anything. The Internet is full of worms, trojans, viruses and they are spreading more and more. Even if you have a firewall is not enough. The best security for your computer is to have it unplugged from power and network … and even then you cannot be 100% about security of your stored data. So today we will talk about encryption under Linux. I will show you how to do it from console and from KDE Windows manager. We have several possibilities to encrypt …

If you want 99.999% availability of your Glassfish cluster then you should do 2 things: 1. Use HADB for user HTTP and Session persistence, 2. get some SUN support. I cannot help you with the decision on point 2, but with point 1 I will show you how to doit.In this article I will NOT start again to show you how to configure a Glassfish cluster, because this is already made in this article. Today I will present how to add HADB functionality to a existent Glassfish cluster.

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This article will cover the DNS dynamic updates and DHCP DNS updates. I assume you already followed my last 2 articles “Linux ISC DHCP Server under Debian and Ubuntu” and “Linux ISC DHCP Server failover under Debian and Ubuntu” and I assume you have minimum skills in configuring ISC BIND dns server.
Why Dynamic DNS with DHCP ? Beacuse is hard to remeber IP’s for all type of devices. Managing a Dynamic DNS is more simple than learn everytime new ip’s from your network. Also this configuration in big networks …

We discussed in our early article “Linux ISC DHCP Server under Debian and Ubuntu” how to configure a plain standard ISC DHCP server. In today article we will discuss about ISC DHCP failover. In small networks haveing 1 single DHCP server is a common thing, but in a medium or large computer network 1 single DHCP server is a single point of failure. When the DHCP server goes offline your workstation, or any other network device, lose their network connectivity and this can transform in a big problem for your …