How to disable touchpad tapping (clicking) with Ubuntu


My original post described how to install the qsynaptic utility to fix this problem, but it turns out that the settings are lost every time you restart your computer, so I have found a much quicker fix to disable touchpad tapping. Just add this line to your /etc/X11/xorg.conf:

Option "TapButton1" "0"

If I get some time I will re-visit this issue to see why the other method doesn’t save.

Broken Method – Doesn’t Save Settings!

One thing that always frustrates me when I install Ubuntu on a laptop, is that the default behaviour for the touchpad is to allow “tapping” as a left button click. Perhaps it’s just me with my fat fingers, but I am constantly clicking by accident. However, thankfully it is easy to fix with 4 simple steps.

  1. Simply edit /etc/X11/xorg.conf, find the labelled “Synaptics Touchpad” and add the following line to the end of that section:
    Option "SHMConfig" "on"
  2. Install the qsnaptics utility with
    sudo apt-get install qsynaptics
  3. Now you need to load these new settings by rebooting x windows. To do this press CTRL + ALT + BACKSPACE simultaneously.
  4. Finally, when you have logged back in, press ALT + F2 to bring up the run window. In this type qsynaptics and then click run. This will load qsynaptics where you can disable tapping on the tapping tab.

Ubuntu PXE (network) install with Fiesty Fawn (7.04)

1) First of all, setup tftpd on the server where you want to host the network boot files:

sudo bash
apt-get install tftp-hpa tftpd-hpa xinetd
vim /etc/xinetd.d/tftpd

2) Paste in the following:

---- BEGIN CUT ----

service tftp
        disable = no
        socket_type = dgram
        protocol = udp
        wait = yes
        user = root
        server = /usr/sbin/in.tftpd
        server_args = -s /tftpboot

---- END CUT ----

3) Make the tftp user account:

useradd -d /tftpboot tftp

4) Download the latest ubuntu "netboot" files:

lftp -c "open; mirror netboot/"
mv netboot/ /tftpboot/ubuntu7.04

5) Setup your DHCP client to give out the following file via BOOTP


How to fix the backspace key in screen

I’m running Ubuntu 7.04 on my home server, and for some reason today the backspace key stopped working correctly in screen. Whenever I pressed it, it would give a ‘Wuff Wuff’ error! It turns out that screen was treating it like the delete key instead, and so since there were no characters in front of the cursor, it was giving an error. To fix this however, is relatively straightforward:

First edit your .bashrc file and add an alias for screen:

$ vim ~/.bashrc
alias screen='TERM=screen screen'

Then run:

$ source ~/.bashrc

And that's it!

Mac Mini + Ubuntu + Quagga join LINX

We had a dilemma at work last week. We were joining the London INternet eXchange, and had to find some suitable BGP routers to install in their racks, but since power is somewhat limited in London data centres at the moment, we had to find something that used less than 150W of power draw.

The solution? A pair of Mac Minis running Ubuntu and Quagga with two 24 port HP gigabit switches.