Java 9 released

After years of development Oracle has released Java 9. It is available to download from the Oracle page as usual. Here is the EOL message for Java 8:

End of Public Updates for Oracle JDK 8

Oracle will not post further updates of Java SE 8 to its public download sites for commercial use after September 2018. Customers who need continued access to critical bug fixes and security fixes as well as general maintenance for Java SE 8 or previous versions can get long term support through Oracle Java SE Advanced, Oracle Java SE Advanced Desktop, or Oracle Java SE Suite. For more information, and details on how to receive longer term support for Oracle JDK 8, please see the Oracle Java SE Support Roadmap.

Openssl certificates for apache

In my former post i described a way how to create self signed SSL certificates with an own certificate authority. These certificates didn’t work in latest chrome versions so I updated my scripts to create valid certificates for chrome. This time I only create wildcard certificates because creating one for every subdomain was annoying.

I also tried to use these certificates in postfix which did NOT work. To create files for postfix see my former post.

 

Robo 3T MongoDB client fails to start on ubuntu 16.04

I tried to rim robo3t-1.1.1-linux-x86_64 downloaded from https://robomongo.org/ and got the following error when trying to run it:

Trying to install xcb via apt install xcb doesn’t change the behavior. Then I found a solution by removing all libstdc++* files from the lib directory in the extracted directory:

failed to run Kubelet: failed to create kubelet: misconfiguration: kubelet cgroup driver: “systemd” is different from docker cgroup driver: “cgroupfs”

Distributor ID: Ubuntu
Description: Ubuntu 16.04.3 LTS
Release: 16.04
Codename: xenial

Docker version 17.06.0-ce, build 02c1d87

openshift-origin-server-v3.6.0-c4dd4cf-linux-64bit

I followed the steps under https://docs.openshift.org/latest/getting_started/administrators.html#downloading-the-binary and got the error in the title. To fix this you have to add “–exec-opt native.cgroupdriver=systemd” to ExecStart of docker. The best way to do this is to add a addin file /etc/systemd/system/docker.service.d/override.conf with following content:

Then reload systemd and restart docker:

 

SSL certificates for apache

Simple way to create self-signed SSL certificates.

 

Ubuntu: Docker behind proxy

 

disable input device like a touchpad und linux

You get a list of all input devices with the command “xinput list“. You will need the id of the device you want do disable or enable. Here is an example output of this command:

To disable (0) or enable (1) the touchpad with id=12 you can use these commands: