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ScheduledTasks with Powershell

Finally, I was able to take a look at the Core Edition of Windows 2019, where I had to build a monitoring for the pending updates on the system. Since the monitoring agent only allows a timeout of 30 seconds… Continue Reading →

Zammad and the “SearchIndexAssociationsJob”.

I would like to briefly tell you about a small and quickly solvable problem that hit me in my daily work environment. Recently I updated a server including the Zammad1 installation and prombt got some errors displayed. Error messages Failed… Continue Reading →

Create and share passwords on the fly! Secure!

Dealing with passwords in general Passwords, a necessary evil and often the only protection against access to one’s own identity (facebook) or other services. But now it happens that we administrators sometimes have to exchange passwords and usernames. Often also… Continue Reading →

Monitoring Kubernetes cluster health with ZABBIX

Ever wanted to use ZABBIX to monitor Kubernetes resources? Just recently, we got the chance to play around with some Kubernetes resources and create solutions to integrate them into existing environments. One of the most popular topics that popped up… Continue Reading →

SSH / Clientconfig – Unknown wrongfully

If you have several Linux servers in your care and are allowed to maintain them, you surely know the problem of different SSH keys for different customers, environments or security aspects. Now of course there are several solutions, one approach… Continue Reading →

Howto setup a mariadb cluster

I just did it, you did it also once and you will do it in the future or if you are on this page because you want to do it right know, its a honor for me to help you… Continue Reading →

Test your bandwidth with dd or/and netcat

If you dont have a iperf on your server and you cannot install it for some reasons my iperf article will not help you to determine your throuphput. But you can check your bandwidth with some other tools. Most of… Continue Reading →

iperf – a great bandwidth measure tool

Today i want to introduce a little bandwith measure tool to you. iperfis a tool to measure the bandwith between to systems. It is a client/server application, so you need to install it on both sides. To install this little… Continue Reading →

DNS Timeouts in DUALSTACK Umgebungen

A few days ago, we had some strengh phenomenon on our Oracle RAC Servern with TNSListener Timeouts. EM Event: Critical:LISTENER_SCAN3_rac-scan – Listener response to a TNS ping is 5,010 msecs After some research and many hours of analysing, we could… Continue Reading →

Oracle RAC Backup with Backup Exec

All configurations needs to be done on every RAC-Node. All shell-outputs are examples. Prerequisites Oratab and Beoratab The following step are essential on every RAC-Instance. cp /etc/oratab /etc/VRTSralus/beoratab Setting the permissions for the beoratab: chown root:beoper /etc/VRTSralus/beoratab chmod g+w /etc/VRTSralus/beoratab… Continue Reading →

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