Linux on Marko Apfel

Installing ClearOS 6.5 with graphical UI on XenServer 6.2

Fri, 09 Jan 2015 15:08:00 +0100

XenServer provides several templates for different operation systems of its hosted virtual machines.

Unfortunately there is no template for ClearOS and so I tried some of the in my opinion best fitting templates.

Running OpenVPN on a hosted server and internally on a Rasperry Pi

Fri, 05 Dec 2014 13:11:00 +0100

Introduction

Motivation

How about a secure access from outside into the own home network? So we can maintain machines, change configurations, getting files, .. from where ever we are. For this we let a VPN tunnel be established between a local RPi in our network to a hosted server. If this hosted server that offers a web based console we only need a web browser to access our own resources at home.

Network settings for ClearOS in VirtualBox

Tue, 25 Nov 2014 19:37:00 +0100

ClearCenter offers an almost ready to go VirtualBox image:

http://www.clearfoundation.com/Software/downloads.html

With the first boot it provides a web based configuration GUI via URL

https://10.0.2.15:81/

Per default it is not possible to access this URL from the host machine which runs the VirtualBox virtualization software. So it is necessary to forward the request to the virtualized guest (ClearOS).

ClearOS: Installation hangs during system update with “Exception: Didn't install any keys”

Tue, 25 Nov 2014 15:23:00 +0100

During my first installation of ClearOS the (web) installer hangs during the system update step. It downloaded a lot but it didn’t applied the updates because of the error Exception: Didn't install any keys.

Replace or keep existing configuration files during Linux updates/upgrades

Thu, 20 Nov 2014 17:03:00 +0100

During updating/upgrading a fresh Moebius installation on a RaspberryPi with

apt-get update && apt-get upgrade

it brought this question:

Configuration file `/etc/issue'
==> Modified (by you or by a script) since installation.
==> Package distributor has shipped an updated version.
What would you like to do about it ? Your options are:
Y or I : install the package maintainer's version
N or O : keep your currently-installed version
D : show the differences between the versions
Z : start a shell to examine the situation
The default action is to keep your current version.
*** issue (Y/I/N/O/D/Z) [default=N] ?

The default hint not to do that is mainly for longer running installations to avoid an overwriting of existing configuration files. In case of a fresh installation you should confirm with Y.

Specifying new screen resolutions for ubuntu in a virtual box

Tue, 06 Mar 2012 18:34:00 +0100

Per default Ubuntu offers screen resolutions which does not fit for my laptop. My panel allows 1980x1080 but the best fitting choice from ubuntu was 1280x960.

But with some nice commands you could pimp the list of available resolutions: