Upgrade Debian Wheezy to Jessie

Debian

Pre upgrade recommendations:
– run a full backup of your running system
– remove unnecessary packages or repositories
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ESXi

ESXi

To Download the iso-image of actual ESXi, you have to complete the free registration on vmware.com.
Registration is strict required otherwise you will be not able to download the installation media and the free license.

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KVM-Virtualization under OpenSUSE

libvirt

KVM, Kernel-based Virtual Machine, is a hypervisor built into the Linux kernel. It is similar to Xen in purpose but much simpler to get running.

Unlike native QEMU, which uses emulation, KVM is a special operating mode of QEMU that uses CPU extensions (HVM) for virtualization via a kernel module.
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Upgrade opensuse 42.1 to 42.2

countdown-leap-42-2-alex

openSUSE 42.2 Leap is still at the moment in RC2 state but a upgrade is already possible.

More information about 42.2 Leap can be found in the official release notes

I have a fresh installed 42.1 which is fresh patched so the first step will be the replacing of repository information:
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XMPP bring jabber server to live

XMPP

Extensible Messaging and Presence Protocol (XMPP) is an open XML technology for real-time communication, which powers a wide range of applications. Monitoring such as Icinga notifications or alive ping from a mobile phone.

Installation of ejabberd instant messaging server for XMPP:
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Upgrading openSUSE 13.1 to openSUSE 13.2

openSUSE 13.2

Some days ago was release a new version of openSUSE with a huge list of new feature.
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MTR for Mac OS X

MTR Logo

One of the best tools to verify network connectivity after ping. Its a kind of combination between ping and traceroute. It shows you all host on your way (dependent on routing). Personal I find the packet loss overview very helpful especially if you have problems with your ****ing ISP.

You can get the MTR self installer for MAC OS X: here

Command syntax:

1
/usr/local/sbin/mtr 8.8.8.8