One of the things that is not implemented in the Secure Shell Chrome extension is the ability to remove know_host fingerprints which alert you if the fingerprint for a specific IP address has changed.

However there are times when you upgrade a systems and this need to be done.

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
d6:be:12:7e:22:23:c3:e1:56:30:d6:cd:65:b7:ab:42.
Please contact your system administrator.
Add correct host key in /.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /.ssh/known_hosts:7
ECDSA host key for xxxxxxxxxxxxx.yyy.au has changed and you have requested strict checking.
Host key verification failed.
NaCl plugin exited with status code 255.
(R)econnect, (C)hoose another connection, or E(x)it?

Synology NAS systems are great VPN servers for a home or small office. However if you want to connect to the VPN and route all your traffic through the VPN and be able to browse the internet there are a few things you need to change on the Synology server.

Theoretically you should be able to set these options on the client, but I have not managed to get this to work with Synology and judging by the amount of forum threads a lot of other people had the same problem. If somebody has a better way to fix this I would love to know. I don’t like to manually change these config files as I assume they will be overwritten when making changes to the web-interface.

Unfortunately it is still much harder than necessary to find notebook hardware to use with Ubuntu (or other Linux variants). This blog is full of past experiences (some of them quite time-consuming) on finding notebook hardware that will work without too much fiddling. This short note is to document my recent research on that front to help others who want to do the same (as there doesn’t seem to be a lot of good current info around).

Every once in a while you find a gem. One of these for me is SShuttle – until now I have not known about this one.

Creative Commons Creative Commons Attribution-Noncommercial-No Derivative Works 2.0 Generic License (http://creativecommons.org/licenses/by-nc-nd/2.0/) by Stephan Geyer

Use-case: I just been trying to get Ubuntu Make to install Eclipse IDE and the local AARNET download mirror is just refusing to cooperate (https://github.com/ubuntu/ubuntu-make/issues/90). A quick forward to a remote VPS fixed the issue without headaches

[](https://www.flickr.com/photos/leogaggl/16898140083 “ubuntu phone by Leo Gaggl, on Flickr”)

Add SDK repository

sudo add-apt-repository ppa:ubuntu-sdk-team/ppa

sudo apt-get update sudo apt-get install ubuntu-device-flash`

Enable USB Debugging on the device

1. Make sure you have developer mode enabled (see http://developer.android.com/tools/device.html if you are unsure).
2. Navigate to Settings > Developer options
3. Enable USB Debugging. When a device is connected, you will be prompted in Android to authorize it.

Unlock Bootloader

adb reboot bootloader

fastboot oem unlock fastboot reboot`

This is a follow-up on an older blog using Ubuntu.

Creative Commons Creative Commons Attribution 2.0 Generic License (http://creativecommons.org/licenses/by/2.0/) by rosmary

Raspberry Pi Prerequisites

Since this will be a purely headless install designed to sit in a corner behind the scanner I am using a Base Raspian (Debian Wheezy) install (I personally like the clean minimal install via https://github.com/debian-pi/raspbian-ua-netinst the best).

There are plenty of sites out there that give advise on this topic, unfortunately most of them are highly ad-infested to the point of being unreadable as well as only containing single bit rather that an overall picture. This is a collection of useful links to source materials as well as steps necessary to install.

Creative Commons Creative Commons Attribution-Noncommercial-Share Alike 2.0 Generic License (http://creativecommons.org/licenses/by-nc-sa/2.0/) by Joe Wilcox

Just a quick update of the previous article on “Sony Xperia Z2 upgrading to CyanogenMod 11“.

One thing is that CM now included the custom recovery and you do not need to download any other custom recoveries !

Download the CM 12 ZIP file for Sony Xperia Z2 (sirius) and extract the ‘boot.img’ file

Download link: https://download.cyanogenmod.org/?device=sirius

Get the device into fastboot (bootloader mode)

On remote systems sometimes a web-based tool can be very handy. Webmin is such a tool that has been well maintained for decades. To install quickly on a Ubuntu Server without having to manage dependencies and keeping it updated as part of normal OS update operations installing from a PPA Repo is handy.

sudo echo "deb http://download.webmin.com/download/repository sarge contrib" >> /etc/apt/sources.list

wget -q http://www.webmin.com/jcameron-key.asc -O- | sudo apt-key add - sudo apt-get update sudo apt-get install webmin`

Since I have found some issues with my previous LXQT setup in real-life work I decided to fall back to standard Lubuntu for my cloud desktop. As part of this I also switched to TightVNC which seems a lot easier to configure.

Add local user account

adduser USERNAME
adduser USERNAME sudo

Install Lubuntu Desktop

sudo apt-get install --no-install-recommends lubuntu-desktop tightvncserver

TightVNC Configuration

sudo vim /etc/lightdm/lightdm.conf

#
# VNC Server configuration
#
# enabled = True if VNC connections should be allowed
# port = TCP/IP port to listen for connections on
#
[VNCServer]
enabled=true
port=5900
width=1366
height=768
depth=24

sudo /etc/init.d/lightdm restart

Connect to the remote system

ssh -L 5900:localhost:5900 -i /path/to/your/aws/keyfile.pem YOUR.EC2.IP.ADDRESS

One of the main reasons for setting up a cloud desktop is that I tend to use a lot of different devices some of which are not very powerful.

One of my favorite devices of late has been a HP 11 Chromebook. I originally bought it for a new employee and wanted to check myself how this thing stacks up to do day-to-day computing tasks more efficiently than a standard laptop without all the headaches of running Windows (viruses, endless driver installs, bloatware, malware, …). We already have several people at work working exclusively from Chromebooks and they absolutely love them. Long story short – I ended up keeping the Chromebook for myself as it’s an absolutely great secondary device for me. I can carry it with me everywhere (doesn’t weigh much more than a tablet, roughly the same size as a tablet & has a keyboard and is so much more useful than a tablet).

I have had some issues recently with getting LTE (4G) connectivity on the Vodafone Australia Network using CyanogenMod 11 on multiple devices (http://forum.cyanogenmod.org/topic/92919-no-4g-signal-on-vodafone-au/). Turns out that it was an APN issue after all.

The APN provisioned by default when the Voda SIM card is inserted (vfinternet.au) does not work for the LTE Data Network. It works with GPRS & WCDMA, but fails to connect when the phone is set to prefer LTE (4G) Networks and they are actually available. It means that the handset will loose mobile data connectivity altogether. There are various APN Settings floating around on the interwebs, but any I tried previously did not fix the issue.