When cleaning contacts or rotating the lens to the right position does not solve the error, check whether the lens is correctly retracted inside the lens body.
How does the thumbnails generating work on Ubuntu.
Installation and printing with this device on Ubuntu (with a little help from OS X :))
How to rename the printer device in the system "Printers" configuration application.
When and why MySQL aggregates rows.
Eureka is far more suitable for service discovery, because it is an AP system created especially for this purpose.
Best CLI tool is Imagemagick and best GUI tool is gThumb.
Comparsion of data formats for storaging and transmitting.
How to enable swap partitions on Linux.
Přednáška pro univerzity.
Simplified Lambda architecture: just immutable source data and streaming (and re-streaming) them into secondary databases.
Useful links for C++ GUI building in WxWidgets.
How Hadoop evolved and what currently includes? Interesting presentation about Hadoop history from SlideShare.
How does the development work in ASF?
My excerpt from the book by John Russell.
Bunch of interesting slides from Slideshare.
Commands and settings for clusters administration tool Ansible.
YouTube links to interesting Scala lectures.
Where the Spark loads classes from?
Rules for jar pacakging with Maven.
Few tips for web images preloading.
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