background preloader


Facebook Twitter

More locks for your SSH door. My first article about hardening SSH access (see Resources) considered three methods that are suitable for small operations, such as a home server or a small business with few people requiring remote SSH access: Changing SSH's standard port to an unusual value and reinforcing SSH configuration so that simple-minded attacks just bounce back.Defining a restricted list of users who are allowed to log in using Pluggable Authentication Modules (PAM).Completely hiding the fact that you even allow SSH access and requiring a special "knock" sequence to be recognized as a possible user.

More locks for your SSH door

Using PAM to define a restricted list of users who are allowed to log in still makes sense for larger setups, but the other two options can become bothersome. Therefore, this article examines a couple methods of enhancing security that you can more easily apply to larger configurations: Password-less connectionsRejecting attackers Password-less connections Listing 1. Creating the key pair is only the first step. HomePage. When good disks go bad. Introduction If you have been doing IBM® AIX® systems administration or SAN administration for any length of time, you are probably intimately familiar with disk errors, file system problems, and Logical Volume Manager (LVM) failures.

When good disks go bad

What should you do when one of these situations arises? Or, better yet, how do you prevent them from happening in the first place? This article looks at such situations—when good disks go bad. It starts with an overview of disk errors and their categorization. Back to top Categorizing disk errors I use two main areas to categorize disk errors on AIX systems: impact and duration. Impact can be broken into four main levels: Loss of availability - A loss of availability occurs when storage resources go offline or are disconnected from their managing servers. Duration can likewise be broken down into four main levels: Temporary - This type of disk error is the rare, one-off hiccup that poses no true threat. Détail pour : BugBase.

Présentation du code QR - Explication, information des codes QR. Conserver e. La navigation Web se veut de plus en plus visuelle.

Conserver e

C’est ce que tente de démontrer la société Pearltrees qui propose un service de « social bookmarking » vous permettant d’archiver et de classifier un nombre infini de pages web, par l’intermédiaire d’une interface graphique et ergonomique. Ce système ne présente pas vos liens favoris sous forme de liste comme Delicious mais sous forme d’arbre, de carte. On trouve ainsi deux types d’éléments sur un arbre : les perles et les pearltrees. Les pearltrees sont des dossiers dans lesquels on peut mettre d’autres pearltrees ou des perles qui , elles, sont des liens vers des pages web.

Ensuite, vous pouvez les manipuler, les supprimer et les organiser très facilement. Alors, si vous désirez découvrir cet outil, rien de plus simple. Collaboration Articles Similaires : Fatal error: Call to undefined function similar_posts() in /homez.39/epnresso/www/wp-content/themes/k2/single.php on line 12. 539 - Vive le tweet! A Map of Twitter's Languages. What a joy these maps are to behold.

539 - Vive le tweet! A Map of Twitter's Languages

It’s as if someone took one of those composite satellite maps - you know, impossibly showing the whole world at night, the darkness broken by hubs and strings of artificial light (1) - and gave it the power of speech. For the riot of colours on these maps correspond to the diversity of languages spoken, or rather: typed, on Twitter. The explosive growth of the micro-blogging service’s global popularity is emblematic of a trend affecting the entire internet: it’s becoming less American, and less Anglophone. The most recent numbers I could find, indicate a drop in US-based ‘unique users’ from 62% in June 2009 to just over 50% in January 2010. In relative terms, the world’s top tweeting nation are the Netherlands, with just over 22% of the Dutch online population using Twitter. But which ones? A guy called Mike McCandless extracted the software, another one called Eric Fischer applied it to Twitter.

What does this map tell us? Many thanks to J.B. Accueil - Disposition de clavier francophone et ergonomique bépo. A simple URL shortener.