At first blush, you might be wondering why anyone would need to scan a Linux server for malware.
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Are you worried that your Linux computer may be infected with malware? Have you ever checked? While Linux systems tend to be less susceptible to malware than Windows, they can still be infected. Many times they’re less obviously compromised, too.
There are a handful of excellent open-source tools to help you check if your Linux system has been the victim of malware. While no software is perfect, these three have a solid reputation and can be trusted to find most known threats.
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Are you looking for a up-to-date Linux Distro to use that old laptop you have in the dust in the far corner of your garage? It could not be so easy to find the best Linux Distro to install on it but howtouselinux.net did some great twests for all us:
The review is really well-done and the graphic display of results let you to quickly choose what is the best Distro candidate for your laptop depending on hardware, your tastes and the final use you want to give to your laptop.
In my experience the howtouselinux.net review let me to save a lot of time because I was able to focus my tersts just on the two Distros that seemed to have the right prerequisites for my old eeepc 900: Peppermint OS and Macpup. Recommended!
Sooner or later, if you use Linux and you prefer Terminal to GUI you will stumble on this message:
Username is not in the sudoers file. This incident will be reported
The first thing to clarify is that the “incident” will never be reported outside your computer but in the auth.log file. But if you have previously configured your Linux OS to send these kind of logs to you by email, you receive an alert about.. your own activity with sudo…
In any case, to solve the above mentioned specific sudo matter, use Terminal and type:
sudo gedit /etc/sudoers
At this point the text file “sudoers” will be opened and you will be able to modify it using e.g. gedit.
Obviously you can use another text editor you prefer as, for example, nano. In this case the command will be:
sudo nano /etc/sudoers
Now you have to peer into the text and find the “#User privilege Specification” section and add the command:
your-username ALL=(ALL:ALL) ALL
where ALL=(ALL:ALL) ALL stands for: allow the specific user (your-username) to access all the terminals, as if he/she were any other user, and allow him/her to execute the full range of commands.
And you will obtain something similar to this:
# User privilege specification root ALL=(ALL:ALL) ALL your-username ALL=(ALL:ALL) ALL
Try it! (..if you need…)
When I tried to install Ubuntu 12.04 on an old ThinkPad X40 I was surprised to discover this warning on my screen:
This kernel requires the following features not present on the CPU: pae. Unable to boot - please use a kernel appropriate for your CPU.
In few words I wasn’t able to install Ubuntu 12.04 because the kernel on Ubuntu 12.04 was not supporting my CPU and I was really upset because I have always promoted Linux distributions as the most versatile and appropriate OS to keep using “old” hardware.
Sincerely, as described in an older post, I previously decided to install MATE desktop environment because the graphic cards on many laptops didn’t support Unity and Gnome 3 but this was the first time I had to renounce the installation of Ubuntu. I didn’t want to surrender to this difficulty (that appeared to me as a bug)!
First of all, I discovered that pae is “a feature to allow 32-bit x86 processors to access a physical address space (including random access memory and memory mapped devices) larger than 4 gigabytes“. After I clarified this point, I was not sure that my processor was totally inadequate to support Ubuntu 12.04.
After some web surfing I discovery that there are two easy solutions to avoid this problem.
More in general, it is also possible to assume that if you have a non PAE CPU, your hardware could not be able to support the Unity desktop. For this reason you can keep your Lubuntu – Xubuntu (based on the light but effective LXDE desktop) or switch your desktop environment to Gnome (the Classic, of course) installing the gnome package instead of ubuntu-desktop.
In any case, if you want to know if your CPU supports pae you have to open a Terminal and type:
grep --color=always -i PAE /proc/cpuinfo
At the end I decided! I want to uninstall OpenOffice on my Ubuntu 10.04 LTS and substitute it with an always updated LibreOffice. After some researches on the web I decide to develop my own procedure to be sure that LibreOffice will be always updated with the last available edition.
First of all it is necessary to remove OpenOffice:
– go to System –> Administration –> Synaptic Package Manager –> Quick Search and type OpenOffice
– Mark for Complete Removal all the installed OpenOffice software and Apply your choice, then exit the program
Now, open Terminal and add the PPA repository:
sudo add-apt-repository ppa:libreoffice/ppa
Update the system:
sudo apt-get update Last but not least, go back to Synaptic Package Manager –> Quick Search and type LibreOffice
Select the LibreOffice software and all the add-ons you prefer then Apply your choice.
One of the great problems of interoperability between Linux and Windows has been the impossibility of Linux systems for joining a Microsoft Windows network. Subsequently, several standards to achieve this were developed over the years (see Samba), but they were far from offering normal user the chance to achieve this easily.
The infrastructure of many companies around the world, of all sizes, also relies on the use of a Windows domain. In all companies, one priority always stands out. That is to reduce information costs and expenses. Because of this, many of them have opted for the use of computers with Linux operating systems. But in many cases their integration into Active Directory environments was a problem.
Recently, a new tool was created to facilitate the full integration of a Linux system in an AD environment. And as far as today, it seems very promising. Thanks to likewise-Open5 (http://www.likewiseopen.org/), the difficulty of integration is almost null.
The following lines will illustrate the inclusion of Ubuntu in a Windows domain via likewise-Open5.
Likewise-Open5 Installation process is very simple. It can be done both through the graphical environment and command line. We will use the second variant. Therefore, a new terminal window must be open, in which you specify the following command:
sudo apt-get install likewise-open5
This command should resolve all the dependencies necessary to prepare the machine to be integrated in the Windows domain.
Adding a new machine
To actually add the machine, specify the following command in the terminal window:
sudo domainjoin-cli join domain used
Where DOMAIN is the area used for integrating the machine, and USER is the username that has the corresponding rights. You will be asked for your user password, and once successfully logged in, you are officially added the desired machine.
In 2007, when Prism was launched, there were some enthusiastic reviews about this application. Then the widget era began and Prism popularity decreased. Anyway, Prism is still a powerful application for all that people who desire to run their more often used web application saving RAM and CPU resources. Prism, based on XULRunner, is multi platform, easy to use and very flexible. To use it on Ubuntu you can launch the Terminal and type:
sudo apt-get install prism
or using the Synaptics Package Manager (System —> Administration —> Synaptics Package Manager). Then go to Applications —> Internet —> Prism and a small windows appears. Now, fill in all the required information: the web application URL, the name you prefer, settings and do not forget to click on the Desktop shortcut option. At this point you will find a new rough icon on your Desktop with the name you chose. The first time you use it, with the right mouse button click on it and go to Properties —> Permissions and Allow executing file as program. If you want to change the icon you have to click on it (with the right mouse button), go to Properties —> Basic and choose your favorite icon clicking the icon on the upper left corner. If all are steps are annoying for you, it is possible to use Prism as add-on for Firefox. In this case, on Firefox, go to Tools —> Add-ons —> Get Add-ons and type Prism on the search bar. You will install Prism as a simple add-on for Firefox. Now, you can automatically generate a Prism application just clicking on Tools —> Convert Website to Application when you are in the web application page.
On Windows or MAC we suggest to download the standalone package directly from the official web page or install Prism as Firefox add-on following the same steps we described for Ubuntu. If you use the Prism standalone package you have to decompress it in your favorite location. For Windows users: when you set up a new Prism application, try the tray menu option but do not forget to click on the Desktop shortcut or you will not be able to find again the application after you close it.
This week, in our Linux Page (in Spanish) we have posted a review about Basket Note Pads, a well developed note-taking program for KDE Linux. Basket is nice to look and very well structured. One of the first things you notice are the import – export features which allow you to easily manage text, hiperlinks, images from many different notepad applications. In particular we were really impressed by the Tomboy notes imports on Kubuntu. Moreover, Basket has detailed setting menus you can use to set a password to a specific group of notes or use any PGP key stored on your PC. Unfortunately our tests on Ubuntu – Gnome were unsuccesfull because the program crashed many times and we decided to come back to NoteCase, more graphically simple but stable on every desktop environment. Recommended for Kubuntu!