Riccardo | Linuxaria

Automate easily your tasks on Ubuntu with Cuttlefish

Mar 182013

Cuttlefish is a tool which can execute various actions when specific events are triggered, and it allows you to create events that only happen under certain circumstances

For example, you could set a condition/reaction such as “when the lan network is connected start Transmission”, or “Unmute the audio when I start Banshee and mute it when I close Banshee”.
The nice things of this program is that it’s completely configurable via a nice graphical interface that makes the creation of any task extremely easy and intuitive.
The software is wrote in python, open source and is born on Ubuntu as “Ubuntu app” and so it’s easily installable on this distribution or Derivate, there is a package from AUR for Arch Linux and I’m sure soon you’ll find it for any distribution.

CPU-G & I-NEX excellent alternative to CPU-Z for linux.

Opinion, Reviews No Responses »

Mar 092013

Article based on an Italian article published on http://ilblog.openresource.it .

CPU-Z is a freeware system profiler (system monitor) application for Microsoft Windows (for all versions from Windows XP on) that detects the central processing unit, RAM, motherboard chipset, and other hardware features of a modern personal computer, and presents the information in one window.

But don’t worry in Linux there are many alternative, and in the past I’ve presented 3 command line commands that you can use to get information on your Linux box: lsusb, lspci and lshw and a graphical alternative hardinfo.

Today I’m glad to present you 2 more graphical tools specific to gather information about the CPU: CPU-G and I-Nex

Steganography or how to hide text in image or sound files

Articles, Guides No Responses »

Mar 092013

Steganography is the art and science of writing hidden messages in such a way that no one, apart from the sender and intended recipient, suspects the existence of the message, a form of security through obscurity. The word steganography is of Greek origin and means “concealed writing” from the Greek words steganos (στεγανός) meaning “covered or protected”, and graphei (γραφή) meaning “writing”. The first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography and steganography disguised as a book on magic. Generally, messages will appear to be something else: images, articles, shopping lists, or some other covertext and, classically, the hidden message may be in invisible ink between the visible lines of a private letter.

And now that we have saw the definition of this word, let’s take a look at three open source programs for Linux that you can use to play with this concept: Steghide and Outguess and one closed source Steg

Proxmox version 2.3 available

Articles, News No Responses »

Mar 042013

Proxmox Ve is an Open Source project developed and maintained by Proxmox Server Solutions GmbH in Austria under the auspices of the Internet foundation of Austria (IPA) and it’s released under the GNU General public license 3. It is a solution based on Debian 6 Squeeze at 64 bit, which duly “customized”, allows to create a virtualization environment of type “bare metal” based on OpenVZ and KVM technologies.

Proxmox Virtual Environment, today announced the release of version 2.3. The version brings new compelling features like KVM live backup technology as well as the integration of the Ceph RBD (RADOS Block Device) as storage plugin.
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How to keep ssh connections alive on Linux

Guides 6 Responses »

Mar 032013

Many NAT firewalls or VPN server time out idle sessions after a certain period of time to keep their trunks clean. Sometimes the interval between session drops is 24 hours, but on many commodity firewalls, connections are killed after as little as 300 seconds, and this can be a problem if you are working on a remote machine and suddenly you find yourself logged out with a message “Connection reset by peer”.

In a former article I’ve presented autossh, a solution that comes to your help when you want to be sure that a SSH connection stay always on between 2 machines. Autossh is a simple program that allows you to run an instance of ssh, keep it under control, and restart the same instance once that the connection is dropped up to a maximum number of times controlled by an environment variable.

This is useful if you need to have a “permanent” connection between 2 machines, but perhaps you just need to have a connection between your personal computer and different servers, and in these cases autossh is less useful, so let’s see how to use some openssh options to keep our connection open.
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