SUSE Linux Expert Day 2015 Frankfurt

Jan 25, 2015 · 9 min read · suse-manager ·

This week one of the SUSE Linux Expert Day events that are taking place worldwide since september 2014 was hosted at 25hours Hotel Frankfurt by Levi's - a very stylish and fancy location!

Agenda

The event was planned for 5 hours and consisted of many interesting talks:

Keynote - Michael Jores, Regional Director …

Red Hat Satellite 5.7 released

Jan 16, 2015 · 5 min read · red-hat-satellite spacewalk ·

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This week Red Hat Satellite 5.7 was released. With the ninth update of the 5.x tree many improvements from the Spacewalk development were applied.

New web interface

Monitor washing machines with Nagios / Icinga: check_gpio_pir

Dec 27, 2014 · 4 min read · icinga nagios raspberry-pi ·

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Winter time is crafting time! I spent the last couple of days on the Raspberry Pi and PIR sensors (Passive Infrared). Using this sensors it is possible to recognize motions - in combination with GPIO APIs you can create useful applications.

The first idea that came in my mind was to monitor my washing machine in the …

Cisco SG 300: configure Port Security with MAC filtering

Dec 23, 2014 · 3 min read · cisco ·

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If you own a Cisco SG-200/300 switch you are lucky to configure Port Security and MAC filtering. The advantage of this is that you are able to define which MAC addresses may establish connections on particular ports. Other devices will not be able to access the network - which is a good idea especially for public …
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Minimal CRUX-ARM installation

Nov 23, 2014 · 3 min read · raspberry-pi ·

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CRUX-ARM is a Linux distro for ARM devices like the Raspberry Pi that follows the KISS philosophy. If you're looking for a minimalistic system you might want to have a look at the construction kit.

I'm using CRUX-ARM on one of my Raspberry Pi's. The installation fits on a 1 GB memory card. On the project's wiki there …

Short tip: Install Microsoft fonts under Enterprise Linux

Nov 14, 2014 · 1 min read · kurztipp ·

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Some applications still require Microsoft fonts under Linux. Some Linux distros dropped those fonts because of license difficulties. Microsoft offers those fonts for free but redistributing them is prohibited by the used license. Debian-based distros offer a package msttcorefonts-installer which downloads and extracts …
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Sending and receiving mails under Linux usind msmtp and mutt over Microsoft Exchange EWS

Nov 11, 2014 · 3 min read ·

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Especially in Microsoft-embossed environments it might be needed to send and receiver mails over Exchange. Some graphical mail clients like Evolution are offering support for this - of course this is not a good solution for servers without graphical user interfaces.

DavMail is a Java-based platform-independent software …

Short tip: Online update hard drive sizes under Linux

Nov 10, 2014 · 2 min read · kurztipp ·

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When hard drive sizes are altered the Linux kernel isn't informed about these changes automatically. Rebooting the system is a possible solution - but often no option.

Beneath the directory /sys/class/scsi_disk you will find additional files controlling some of the device's function depending on the SCSI id. Using the …

Short tip: VMware ESXi doesn't recognize SSD as SSD

Nov 5, 2014 · 2 min read · kurztipp ·

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During a server installation recently a local attached SSD wasn't recognized as SSD and therefore it was impossible to use it as vSphere Flash Read Cache. Not always the reason for this issue is a controller misconfiguration - sometimes ESXi just doesn't recognize the SSD as flash drive. In this case it is possible to …
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GitBucket: GitHub clone for your intranet

Nov 1, 2014 · 2 min read ·

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GitHub is a very comfortable portal to collaborate source coces. The service manages versions using Git - for documentation purposes bugs and wiki contents can be provided. Especially the open-source scene uses the service a lot but for internal, non-public developments it is only partially suitable.

Premium users are …