dnsactual.sh FreeDNS client

Since ddclient is supposed to work with FreeDNS, but is not *actually* working on Ubuntu, changed to dnsactual.sh from afraid.org unix client listings.

Since there's no .deb, had to hack it.

location: /usr/local/bin
schedule: root crontab every minute

TOKEN="YOU WISH :-)"
PATH=/bin:/sbin:/usr/bin:/usr/sbin
IFACE=[PUBLIC-IF]

if test -f /etc/freedns/dnsactual.conf
then
CacheIP=$(cat /etc/freedns/dnsactual.conf)
fi

CurreIP=$(ifconfig $IFACE | grep -oEe "addr:[0-9\.]*" | cut -f 2 -d :)

if [ "$CurreIP" = "$CacheIP" ]
then
# Both IP are equal
echo "Update not required..."
else
# The IP has change
echo "Updating http://free.afraid.org with " $CurreIP
wget http://freedns.afraid.org/dynamic/update.php?$TOKEN -o /dev/null -O /dev/stdout
echo `date` "Updating log with IP " $CurreIP >> /var/log/dnsactual.log
fi
rm -f /etc/freedns/dnsactual.conf
echo $CurreIP > /etc/freedns/dnsactual.conf

Get Grub2 to save last chosen entry

Every piece of pseudo-help I've read on this matter says:

"edit /etc/default/grub, and set GRUB_DEFAULT=saved" to save your default boot choice.

While this is true, its not complete. It's not what 90+% of the people are looking for. It's a question of semantics.

I want to save my default boot choice EVERY TIME I BOOT... i.e. save the last chosen entry every time I boot - for multi-OS systems, I believe this is fundamental.

For this to happen, you need to ADD to /etc/default/grub (it's missing altogether in the file) the entry:

GRUB_SAVEDEFAULT=true

This solves this issue. Without this line, /boot/grub/grubenv never gets updated when you choose you boot entry in grub boot menu.

This option is listed in 'info grub', but appears nowhere in the /etc/grub.d/* files.

Following the usual notation, the entry should be in the file, set as false and commented, indicating the default option if omitted:

#GRUB_SAVEDEFAULT=false

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Disable IPv6 on Windows 7 ~ 8.1

Create

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\DisabledComponents = 0xffffffff (DWORD:32b)

[edit - it also works for Windows 8 and 8.1]

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Disable IPv6 on Ubuntu 10.04 Lucid Lynx

Add to /etc/sysctl.conf


#disable ipv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1


and reboot... or for a quickie, 'echo 1 > /proc/sys/net...' as root

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Wireshark as non-root user

When in Windows, you get the NPF service... in Ubuntu/Debian, you get:

apt-get install libcap2-bin
setcap 'CAP_NET_RAW+eip CAP_NET_ADMIN+eip' /usr/bin/dumpcap

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TomTom maps - latest version

Determine which version is the latest for your TomTom device:

1. Go to tomtom.com/products/maps and select map (for ex. - Europe-840 for x50 devices)
2. right click on map's picture and get properties - you'll see ....tomtom.com/lib/img/mapshop/maps/map14477.gif - here 14477 - is map ID in TomTom store.
3. create url-path with this ID: http://num1.id.tomtom.com/14477
4. put this link to your browser - voila! Now you got almost all map's info including region, build, IQ Routes™ supporting, supported devices

Et voilá!

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Ubuntu & NVidia :: Dual screen setup and gnome-panel

Dual monitors, set up with nVidia TwinView in a way that the gnome-panel does not stretch across the whole desktop but is only on one monitor.

Now I want to add another panel on the second monitor, but if I create a new one, I can only add it to the primary display.

Solution:

• add a new panel as usual
• run gconf-editor and go to apps/panel/toplevels/panel_
• set the variable "monitor" from 0 to 1

And that's it!

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