Category Archives: Operating systems

Mac OS X: Icons of Apps Disappeared from Launchpad

A Solution for OS X Yosemite and OS X El Capitan as well as older releases like OS X Mavericks Sometimes it is strange. Suddenly icons of apps are disappearing from the Launchpad. If you open the applications folder in … Continue reading

Posted in Mac, OS X | Tagged , , , | 3 Comments

OS X: Some Icons Suddenly Disappeared in Finder

Suddenly some icons, not all, disappeared in my Finder on my MacBook.  A restart and clearing the caches could not solve this problem. Fortunately a reinstallation of OS X was not necessary because the solution was so simple…

Posted in Mac, Operating systems, OS X | Tagged , , | 1 Comment

OS X: Aquamacs and GNU Emacs — Keyboard Problems on the Mac

If you are — like I — one of those strange people who are not using a keyboard with US layout on a Mac, you might encounter a real problem while using the apps Aquamacs and GNU Emacs on OS … Continue reading

Posted in Emacs, Mac, OS X | Tagged , , , , , | 4 Comments

WebSphere Application Server: Jython Throws an IOException While Accessing Environment Variables

If you try to access an environment variable via Jython’s os.environ in wsadmin of WebSphere AS and you are on the “wrong” Windows release you will get an IOException telling you “Cannot run program “sh”: CreateProcess error=2, The system cannot … Continue reading

Posted in Java, Java EE, Jython, Programming, Python, WebSphere AS, Windows | Tagged , , | 5 Comments

Renaming a Linux Volume Group Containing the Root File System

Not often, but sometimes you find yourself in situations where you have to rename a volume group on Linux. You have a base image in a virtualization platform, for example. You clone it and you realize that your preferred Linux … Continue reading

Posted in Linux, Operating systems, Virtualization | Tagged , , , , | 3 Comments

Display UIC on OpenVMS as easy as id on Unix and Linux

On Unix it is easy to get your numeric UID and the GIDs of your primary group and secondary groups. You call the program id simply. On OpenVMS it is not such easy to retrieve your numeric UIC which is … Continue reading

Posted in DCL, OpenVMS | Tagged , | 2 Comments

JBoss AS 7 on Raspberry Pi

Raspberry Pi is a popular single-board computer based on an ARM processor. This system is capable of running Linux. Java is also available for Linux on ARM as OpenJDK and Oracle Java SE. With JBoss AS 7 exists a lightweight … Continue reading

Posted in Java EE, JBoss AS, Linux, Raspberry Pi | Tagged , , , | 4 Comments

Alt Gr Key Doesn’t Work on Windows 7 Anymore — A Solution

A few days ago on my German keyboard the Alt Gr key didn’t work anymore. When I tried to enter special characters such as ~, @ and | I used the typical German key combinations [Alt Gr] + [+], [Alt … Continue reading

Posted in Operating systems, Virtual Box, Virtualization, Windows | Tagged , , | 45 Comments

How to build GNU Emacs on OpenVMS

OpenVMS comes with several text editors on board. All fulfill their purpose well. For a supporter of GNU Emacs you might also want to have your favorite editor on OpenVMS, too. This post shows you how to bring GNU Emacs … Continue reading

Posted in Emacs, OpenVMS, Operating systems | Tagged , , , | 5 Comments