Archive

Posts Tagged ‘Ubuntu’

Free network scanner for OSX, Windows and Linux

January 23rd, 2010

Angry IP scanner is a free network scanner which supports Mac OSX, Windows and Linux. It has an intuitive GUI which makes it easy to use. You can download Angry IP scanner here, more screenshots are available here.

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Fixing Cyrus SASL(-13): authentication failure: checkpass failed error

October 7th, 2009

The last few days I keep having trouble connecting to my imap server running Cyrus. I started to view my syslog when trying to authenticate to the Cyrus server, there was one line interesting:

Cyrus SASL(-13): authentication failure: checkpass failed error

I thought it should have something to do with the passwords so I tried to enter the Cyrus server with:

# cyradm localhost

When I entered my password I could not connect. This was weird since I was 100% sure about the correctness. To be sure I resetted all my imap box passwords using:

# saslpasswd2 username

This didn’t fix it either. Then I read on a website about the saslauthd daemon not running. I restarted the service and everything worked as normal :) My guess is that an Ubuntu update stopped the saslauthd daemon but did not restart it.

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Readout sensors of an EEE Box running Ubuntu server

August 11th, 2009

Quintin, a friend of mine, showed me a way to readout the sensors of my EEE Box in Ubuntu server.

The first step is to install the lm-sensors package

$ sudo apt-get install lm-sensors

Then you need to load the w83627ehf kernel module using

$ sudo modprobe w83627ehf

In order to have your sensors detected launch the command below and follow the steps shown (basically you can just press [enter] to each question).

$ sudo sensors-detect

Now you can readout your sensors by using the command

$ sensors

Remember if you want to load the w83627ehf module every time the sysem reboots, you need to update your /etc/rc.local with the line:

modprobe w83627ehf
readout of my sensors

readout of my sensors

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Set Xubuntu splash

July 20th, 2009

I wanted to switch from Kubutu to Xubuntu, this all went fine except the splash screen. The startup splash still was the Kubuntu one. In order to change this to the following:

$ sudo update-alternatives –config usplash-artwork.so

Select the option of your Xubuntu splash screen. Reload the spash with:

$ sudo dpkg-reconfigure usplash

Picture 4

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How to change the timezone in Ubuntu

July 14th, 2009

After installing Xubuntu in VMWare I noticed that it had the wrong timezone set up. In order to change the timezone execute (as root) the following:

# dpkg-reconfigure tzdata

Picture 15

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Kubuntu Jaunty on Samsung NC10

April 25th, 2009

A while ago I posted about how one can install Kubuntu on a netbook without cd-rom device. Although there were some issues on the NC10 still it worked pretty neat. Two days ago Kubuntu Jaunty (9.10) was released. I updated my NC10 with this version and this is what I discovered:

  • Video artifacts in KDE login screen disappeared
  • Speakers are muted when plugging in earphones
  • Getting Wifi to work is a lot harder than the old Kubuntu version (especially 802.1x). I have to use knetworkmanager to make it work (sometimes it does not work at all).
  • The screen brightness can be set with the slider of the energy widget.
The new Kubuntu

The new Kubuntu

Gadgets , , , ,

Free Ubuntu pocket guide and reference

February 8th, 2009

Keir Thomas has written a nice ebook called: Ubuntu Pocket Guide and Reference. You can download this ebook for free or order it for $ 9,94 at Amazon.

Ubuntu Pocket Guide and reference cover

Ubuntu Pocket Guide and reference cover

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Linux ,

OpenVPN on Ubuntu server for OSX clients tutorial

January 27th, 2009

I have three computers: MacBook Pro, Netbook and a PC. They all have their own data. It would be very nice if I had all my files on just one location (e.g. my server). The only problem is: how do I access these files in a secure way. SSH is an option, but does not quite fit my needs. The solution: NFS over a VPN. NFS fulfilled all my needs, but I do not want to open NFS to whole world through my router.

A VPN, gives me access to my home network and makes it possible for me to access all my files in a secure way. My server (an Asus EEE Box) runs Ubuntu Server, and there is a Linux version of OpenVPN! I thought installing OpenVPN should not be that hard; I just need to find the right tutorial.

openvpn_logo

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Connect from Mac OSX to Ubuntu NFS

March 11th, 2010

I noticed that I connect a lot to my server in order to retrieve files, so I thought it would be useful to connect through NFS instead of Samba. Installing NFS on my server was a piece of cake. Just follow this tutorial and you are done.

The only thing you need to do then is manage your shares in the /etc/exports file. So far so good. But when I want to connect I receive an error which tells me I use the wrong username and/or password. Funny enough the whole system did not even prompt for any of these credentials.

NFS connection error in OSX

NFS connection error in OSX

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Linux ,