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 →
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 →
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 →
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 →
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 →
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 →
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 →
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 →
To use tools like Multipath in zabbix, you have to check the sudo-settings for the zabbixuser. Use visudo to change the permissions for zabbix. Zabbix will not use a Terminal tty, so you should deactivate that in sudo… You can… Continue Reading →
Here are some “quick & dirty” working userparameter for Zabbix :), they check: how many paths per device are available, if some of that paths are in a faulty state Number of paths UserParameter=Count.Multipath.Devices, echo $(( $(echo ‘show paths’ |… Continue Reading →
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