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,

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SELinux: how to change default context of a directory

Sometimes you may want to override the default SELinux context for a given path. This can be easily accomplished editing /etc/selinux/targeted/contexts/files/

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WebLogic 12c: very slow domain creation

When creating a new domain on Linux, does Weblogic gets stuck at the message? Try passing the -Djava.security.egd=file:///dev/urandom option to

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Resuming an scp transfer

Got tired of scp’s inability to resume a large transfer? Try rsync over ssh: rsync --rsh='ssh' -av --progress --partial --inplace sourcefile user@host:

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How to expand a ZFS device

Nowadays virtual environment are very common, thus a hot increase of an existing drive into a virtual machine is a very common operation (roughly equivalent

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SMF Manifest for Oracle 12c DBMS on Solaris 11.1

Here’s the procedure for adding Oracle 12c DBMS as SMF service in Solaris 11.1, based on this guide. The version provided here is