sign_and_send_pubkey: no mutual signature supported – macOS 10.14

Just add this one inside ~/.ssh/config.


And Now for Something Completely Different – Zbudzone furie

The dusk was repeating them in a persistent whisper all around us, in a whisper that seemed to swell menacingly like the first whisper of a rising wind. ‘The horror! The horror!’


And Now for Something Completely Different – Upadłe anioły

Jedyne co mogę powiedzieć na temat tej książki, to: a = g⋅sinα


Kindle Paperwhite and hard space issue

Recently I have encountered quite frustrating issue with Kindle Paperwhite (3rd) and hard spaces inside Mobi document. At the same time (while buying the book) I have download three, different, formats: epub, Mobi and RTF. All of these have hard spaces all over the place in document. However, there is a slight difference in the […]


Samsung and scanning to PDF in macOS Mojave

… is broken. There is no way to use default Image Capture application with Samsung SCX-4500W printer. However, there is hope :) You can download Samsung Easy Document Creator from here: link. Please note that Samsung line of printers was acquired by HP – this is why you have to download application from HP’s pages. […]


How to get JAR location from JNI


And Now for Something Completely Different – Wojtek Justyna TreeOh!

Radio RAM nie zawodzi ;) Tym razem, dzięki nim, dowiedziałem się o zespole Wojtek Justyna TreeOh!. Grają niesamowicie sympatyczny, spokojny, nieprzekombinowany Jazz, którego bardzo miło się słucha – szczególnie wtedy, gdy za oknem robi się ciemno. Nienatarczywy towarzysz wieczornej lektury książek, ale jako tło dla domówki też sie nada. A tutaj link do ich strony […]


And Now for Something Completely Different – Altered Carbon

Zdecydowanie lepsza od interpretacji Netflixa


And Now for Something Completely Different – Company of One

Company of One is … everything


eternity – defined using macOS keyboard settings

To learn what eternity means, change your keyboard setting from this to this


Running JAR file from R using rJava (without spawning new process)

Let’s say we have this, very simple, structure of the project where StringTest.java is a very simple Java class while Manifest.txt contains We can easily create JAR (“executable”) from these files using jar application Now, let’s try to run this code inside R. It’s quite straightforward.


R, Java 11 and making sure you can load rJava

As usual, there are some issues with new Java releases (11 and 12) and R. If you want to run rJava package inside R you have to do few things. First, make sure you are using Java 11 as default inside terminal session. Inside ~/.profile add this line Once it’s done, you have to make […]


macOS boots to black screen of emptiness

1. disable Night Shift It looks like Mojave 10.14.5 has some issues with booting when display colours are adapted to night mode using Night Shift. After starting up my macOS based machine in the evening (when Night Shift kicks in with all the fancy colour settings) I have noticed that machine boots into black screen. […]


macOS Mojave and accessing TimeMachine’s
data from command line (iTerm2)

Whenever I restore (setup) new Mac, I do it manually. I simply install clean system, and transfer what I really need from TimeMachine’s backup – typically using CLI. In Mojave it’s a no-no. If you use iTerm2, you will face following issue while accessing data inside TimeMachine’s storage. What you have to do, is adding […]


Passing vector of vectors to Java from C++ using JNI

While using JNI, it becomes a little bit of burden whenever you want to pass something more complex than simple types back to Java.


How to find files that have certain string in last line

Let’s say you have few files And they may end with two different endings: aaa or bbb. Finding list off files that have given string at the end can be done following way on macOS you have to go slightly different way


Running Java code in R

Let’s say you have a Java class StringTest inside file and you want to run it in R. All you have to do is to compile the code. You will get compiled version of your class – it will have class extension. This is the class you want to run. Let’s take a look at […]


And Now for Something Completely Different – Interwencje 2

Zbiory felietonów – one zawsze niosą ze sobą pewne ryzyka :(


And Now for Something Completely Different – Król



Be careful with JVM library location while building JNI based code

In case you want to compile JNI based code on macOS, be careful. Pay attention to @rpath. If you compile the code like this you will end up with reference to /usr/local/lib/libjvm.dylib. You may face lots of issues related to incorrect `JVM` version used while linking `JNI`. If you want to make sure that your […]