by Andrea Leofreddi

Manage multiple jdk versions on macOS

Using homebrew It's super easy to install any JDK version from the adoptopenjdk builds: Andreas-Mac-mini:installer a.leofreddi$ brew tap AdoptOpenJDK/openjdk ==> Tapping adoptopenjdk/

Tags: macOSX, Java
by Andrea Leofreddi

Perl fails to compile XS modules on macOS Mojave

On Mojave, I ran into a situation while trying to install CryptX via CPAN: "/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- CryptX.

Tags: macOSX, perl
by Andrea Leofreddi

Using Slf4j from C++ JNI

Lately I've been gluing some Java+Netty code with a C++ native library, and I wanted the native code to use Java's logging too (in

by Andrea Leofreddi

Internet is a safe place

In the meantime... a.leofreddi@XXX's password: Last login: Thu Oct 13 17:26:12 UTC 2016 from YYY on pts/0 Last failed login:

Scanner with mono document-feeder: how to scan double-sided documents?
by Andrea Leofreddi

Scanner with mono document-feeder: how to scan double-sided documents?

I'm a happy owner of a Brother DCP-9020CDW which has a nice document-feeder feature, allowing you to automatically scan multi page documents (and perfectly integrated

by Andrea Leofreddi

How to compress a PDF file on MacOSX (& Linux)

Often (and especially when scanning documents with my printer) from MacOSX I would get unreasonable huge PDFs which are not suitable for emails. To strip

Tags: Unix, Linux, macOSX, pdf
Yubico Yubikey, CentOS/RHEL 7 and ssh
by Andrea Leofreddi

Yubico Yubikey, CentOS/RHEL 7 and ssh

Today I wanted to setup ssh yubikey authentication for a CentOS 7 box, and I've lost more time that expected. Since I've found a lot

TimEL: a new streaming API
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TimEL: a new streaming API

TimEL, a Java library specifically developed to ease the evaluation of time series data, comes to with a new streaming API allowing it to crunch

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Jetty on RHEL 7/CentOS 7

If you look around on the internet you may find a lot of blogs guiding you on the installation of Jetty in RHEL 7 (or

Tags: Java, Linux
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cyberz.org is now vleo.org

Back in the 90s I was used to hang out on the irc network, and there, for many years, I’ve used the cyberz nickname,