Geeky Uncategorized

SSH without Host String Check

alias nssh='ssh -o StrictHostKeyChecking=false -o UserKnownHostsFile=/dev/null'
Ubuntu Uncategorized

Pulse Audio Volume Control over Shell

export PULSE_RUNTIME_PATH=/var/run/pulse
 $> pacmd # gibt die pulse audio shell
 set-sink-mute 0 0


Gently getting rid of too many disturbing processes:

ps auxww | grep "too many processes of" | awk '{ print $2 }' | xargs -n1 kill

Panna Cotta Al Caffe

Quelle: Mit leichten Anpassungen aus der Coopzeitung.

Ergibt 4 kleine Gläsli.


  • 4dl Vollrahm
  • 2EL Zucker
  • 1 Vanilleschote, längs aufgeschnitten, Samen ausgekratzt
  • 2TL Burbon-Vanillezucker
  • 1 Säckchen Agaragar
  • 1 Espresso frisch
  • 2 EL Caotina


1/2 Beutel Agaragar, Zucker, Vanillezucker mit 2dl Rahm vermischen. Aufkochen, kurz (1-2 min) köcheln lassen. In die Gläsli abfüllen, ergibt halbvolle Gläsli.

Gläsli ca. 1h im Kühlschrank kühl stellen und hart werden lassen.

1/2 Beutel Agaragar, Caotina mit den restlichen 2dl Rahm vermischen. Aufkochen und dabei den Espresso beigeben, kurz (1-2 min) köcheln lassen.

In die Gläsli abfüllen, die dunkle Espresso/Schoggi sollte über der Vanille Panna Cotta liegen.

1-2h in den Kühlschrank stellen und hart werden lassen.

Mit einem Häubchen Schlagrahm oder wie auch immer servieren.

Ubuntu Zimbra

Upgrading Zimbra and Ubuntu to 8.6 and Trusty

I’ve started with Zimbra 8.0.7 and Ubuntu Precise. The goal was to have both OS and ZCS at the newest stable version. Here was my way to do it:

  • Upgrading ZCS to 8.0.9 (latest 8.0) for Ubuntu12
  • Installing HWE Kernel Packages for Precise
  • Upgrading ZCS to 8.6 using Ubuntu12 Packages
  • Dist-upgrading Ubuntu to Trusty

So far so good. After the dist-upgrade to trusty, Zimbra will not start anymore. This was somehow predicted. But running the Zimbra Installer for Ubuntu14 just bailed out, giving an Perl library error.

The trick was, to use the with the following option:

./ –skip-upgrade-check

Additionally, also skip the database integrity check (for this time). This did the trick for me.

Wenn hinter...


Wenn hinter Düsen Düsen düsen, düsen Düsen Düsen nach.

Hardware Ubuntu

Ubuntu 13.10 on Lenovo Ideapad Yoga 2 Pro 13

Installing and using Ubuntu 13.10 have some pitfalls. This is a diary of my installation attempt. Although I consider my installation as merely stable, and I’ve already put all the necessary files and configs upon, I am not sure, whether this installation is final.

Identified and solved Problems with Ubuntu 13.10

– Dislplay only works, when the following Kernel parameter is set: acpi_backlight=vendor
– Kernel module ideapad_laptop is loaded automatically, which makes the WLAN and Display brightnes keys not working. Blacklisting or rmmod-ing the Kernel module works.

Resizing Windows Partition

As described, using Windows 8.1 is not my cup of tea. Resizing the Windows partition was merely an adventure, because I could not find the Computer Manager I was used to from Windwos XP and 7. How ever, got to the Classic Desktop, right click the Windows (former Start) symbol in the lower left corner, I found the Computer Manager. On the device manager, the Windows partition was able to be resized down to half of the 256GB SSD.

BIOS Settings

Plug-in the Ubuntu USB stick before you proceed.

To open BIOS/EFI settings, you need to power down the system and start it up with the separate very tiny key right to the power key.

In BIOS settings, disable FastBoot and change the boot priority to start up from USB first.

Booting Ubuntu Installer from USB

While having the Grub menu from the USB stick on display, press e to edit the Grub options. On the Kernel load line, add ‘acpi_backlight=vendor’ before the ‘quiet’ option. Press F10 to load these settings – don’t forget to push the Fn key to get F10.

Before Installing: WLAN and Display Resolution

Use the Try Ubuntu First mode to change some settings first before you install Ubuntu to the disk.

Ubuntu uses maximum resolution by default. However, 3400×1800 on 13.3″ is too high dpi to really use it. Use the Display Settings to switch back to Full HD 1920×1080.

To enable Wifi, unload the ideapad_laptop kernel module by typing:
sudo rmmod ideapad_laptop

Give it some time, then you can select your Wifi in network manager as usual.

Use gparted to reduce the Windows partition to the desired value.

Then, install Ubuntu as usual.

Starting Up the First Time

While rebooting into your newly installed Ubuntu, re-add the kernel option ‘acpi_backlight=vendor’. Since Grub is using the full resolution and is doing a full refresh on every keystroke, Grub is practically unusuable. Have patience.

Grub Resolution and Kernel Tweaking

On you newly bootet Ubuntu installation, change /etc/default/grub with the following:
GRUB_CMDLINE_LINUX_DEFAULT=”acpi_backlight=vendor quiet splash”

Use update-grub to have those settings persistent.

To have wifi and screen brightnes buttons working, black list the ‘ideapad_laptop’ kernel module. In /etc/modprobe.d/ I created a file “blacklist-ideapad_laptop.conf”, and in it, I put “blacklist ideapad_laptop”.

Like before, display resolution of 1920×1080 seems to be very comfortable and cozy on this ultrabook. Using the full resolution and higher the font sizes does not work like expected. On Gnome3 Flashback, the top panel is empty afterwards.

Unresolved Problems so Far

– Touchpad is way too sensitive, unable to press a button without moving the cursor
– Using full resolution
– Switching Function Keys / Multimedia Keys
– Rotating the display does not rotate the touch screen. Like this, tent mode is not really usuable.
Helpful sources

I was relying my installation attempt on the following sources:


Thank you so much for your helpful descriptions!


Generate Numerical Codes for Bank Cards

The following only generates six numbers, ideally suitable for bank card codes.
apg -a1 -m6 -x6 -MN -n 10

Geeky Virtualisation

Move a KVM VirtualMachines LVM Volume to another Server

On the target Server, open Firewall for netcat port:

iptables -A ext-in-allow -p tcp -s --dport 19000:19000 -j ACCEPT

Start nc on the target server to read on the port above:

nc -l 19000|dd bs=16M of=/dev/mapper/myTargetLVMDisk

On the source server, dump LV with nc to the target server:

dd bs=16M if=/dev/mapper/sourceLV | nc targetserver 19000

Only for Windows Guests, be sure the disk controller is using IDE instead of VirtIO:

      <target dev='hda' bus='ide'/>
      <address type='drive' controller='0' bus='0' unit='0'/>

Compile resperf for Ubuntu

Resperf and dnsperf are very hany, if you try to benchmark or even test your DNS server. While dnsperf is made for authorative nameservers, resperf is ready to test your resolver (the one with recursion).

However, nominum does not provide an Ubuntu binary. Due to some bugs and missing packages, compilation is not only configure/make/make-install.

Needed packages are (just apt-get install ’em):

  • libkrb5-dev
  • gnuplot

If you encounter the problem, that isc does not find the file ‘stat.h’, issue

cp /usr/include/linux/stat.h /usr/include/isc/