• How to reject spam from certain countries (if you must really, really do it)?

    Every now and then, a question like this pops up on some email server management forum: I'd like to be able to reject connections from remote IP addresses if they're from certain countries. The usual reason is either thatthe sender only receives spam from those countries and is convinced that this will always be the case, or that, since the sender doesn’t need or want to exchange email with anybody in those countries, why bother at all with filtering messages from there?
  • How to create stacked area graphs with Gnuplot

    Gnuplot is a really great plotting utility, that can be used either interactively or automatically, from inside scripts of all sorts. However, sometimes it can be quite difficult to use simply because there are lots of documentation, but it is hard to figure out exactly what piece of documentation you should read and where it is.This is a big problem, because the way you plot data, that is which Gnuplot options you set, can make a huge difference in the readability of the plot.
  • How to post content to a Wordpress blog from the command line

    Wordpress is a great publishing system, but managing it manually can be a very time consuming process. This is especially true when you want to upload lots of posts, or if you would like to write content in your preferred, full-blown text editor and then have it “magically” appear online. Wordpress takes care of these needsallowing remote posting via email or the WordPress XML-RPC interface (if you enable the WordPress, Movable Type, MetaWeblog and Blogger XML-RPC checkbox in goinig to Settings > Writing > Remote Publishing).
  • Review, Linux E-Mail,set up, maintain, and secure a small office e-mail server

    (this is a review that i originally posted somewhere on Slashdot, IIRC) Linux E-mail, Second Edition is a book written for Packt Publishing by I. Haycox, A. McDonald, M. Back, R. Hildebrandt, P.B.Koetter, D. Rusenko and C. Taylor. Linux E-mail containsall the information you need to handle all email services for a small organization on your own Linux server: send and receive messages, provide access to email accounts from any web browser, block as much viruses and spam as possible, possibly before they even enter your server, backup all email and configuration data in the most effective way and, finally, configuration of some email clients.
  • How to create lists of WordPress posts from the command line

    WordPress is a great online publishing system. One of its strengths, as far as I am concerned, is the administration interface, which I find flexible, efficient and easy to use. However, sometimes even that interface isn’t flexible enough.Recently, for example, I needed a quick way to create and insert into another Web page an HTML list of all and only the posts I had published in a certain date range. If you only have four of five posts to manage it’s OK, but what when, as in my case, there are many tenths of them?
  • MCG, the eMail Configuration Generator for procmail and mutt

    Many U*nix users with advanced email needs, a high load of email, and possibly a lot of addresses to keep separated, invariably come to procmail and to Mutt (but the MCG concept can be easily adapted to other MUAs: read on). Procmail and Mutt are so flexible and powerful to allow a total customization of email management, whatever your particular needs are, and they automatize many tasks. Furthermore, they are much less resource hungry than many other solution with the same power and flexibility (do they exist?
  • Flash/nVidia horrors, Gnome/KDE fights in my Fedora 14

    . Just a few days after I had brought back my Fedora computer to life, the last updates in kernel, nVidia driver from RPMfusion and what not did to my Fedora 14 box (the same that was damn slow three weeks ago) what you see in these pictures,taken while visiting a recent Linux.com article on microformats (sorry for their quality, but I had to take pictures because screenshots wouldn’t show the “sticky ad”).
  • Update on, Why is my Linux so damn slow?

    About three weeks ago I became so fed up with the disgusting performances of my Fedora computer to make a public Help request: why is my Linux so damn slow?. I got plenty of help (90 comments to that post while I’m writing this one) and useful suggestions. Later this week I will reformat all those suggestions in a separate post aimed to complete Linux newbies, to help them to find get support faster when they find themselves in a similar situation.
  • Help request, why is my Linux so damn slow?

    I’ve discovered Linux in 1995 and I have been using it as my only home/work operating system since then. I still love it and want to continue to use and promote it, but in the last 2⁄3 weeks it’s become almost impossible. In this page I explain why, hoping to get and collect useful suggestions. First, hardware and software details. These days, I’m using Fedora 14 x86_64 on a computer with an ASUS M3N78-EM motherboard and 8 GB of RAM.
  • Create your Web database applications with DaDaBIK

    Dadabik is Free Software that you can use (writing little or no code by hand!) to create PHP-based Web applications that even users with little previous experience can use to manage several types of (already existing) relational databases. I’m happy to report that, after a quite long stop, development of DaDaBIK recently restarted. The result, which you can see in the screenshots in this page, is version 4.