Tag Archives: commandline

Filtering Spam – Part I

Judging by the contents of the emails I receive on a daily basis, I can fairly safely say that the world is full with people that don’t bother to look for technical vulnerabilities to hack my computer, but simply try to … Continue reading

Posted in email, IT Security | Tagged , , , , , | Comments Off on Filtering Spam – Part I

Observing packets on the wire flying by

Anyone who has ever tried to install a modem or configure an Internet connection has almost certainly wondered if there’s any traffic flowing back and forth from networks. Observing network traffic that is generated by a PC or Mac is … Continue reading

Posted in Computer network, IT Security, Linux, Shell script | Tagged , , , , , , , | Comments Off on Observing packets on the wire flying by

Using Elliptic Curve with an OpenSSL PKI

OpenSSL is a tool that can be used to setup a (simple) PKI, but in its most basic form a command line tool with an endless amount of options. I find myself searching for the correct syntax of OpenSSL to … Continue reading

Posted in Crypto, IT Security, Shell script | Tagged , , , , , , , , , , , , , , | Comments Off on Using Elliptic Curve with an OpenSSL PKI

Tinkering with file encryption

Storing files overseas or “in the cloud” has become somewhat of an issue lately with spying activities of various nations. I think we’ve just seen the top of the iceberg, but at the same time I hope I’m wrong. In … Continue reading

Posted in Crypto, FreeBSD, IT Security, Mac OS X, Shell script | Tagged , , , , | Comments Off on Tinkering with file encryption

Resizing multiple images

I’m sure there are easier ways, and better I assume, to reduce the size of multiple images at once. But there was some point in time where I couldn’t resist the urge of solving this myself using ImageMagick and Tcl/Tk. … Continue reading

Posted in Image processing, Shell script | Tagged , , , , , , , | Comments Off on Resizing multiple images

Rotating photos automatically

Stuff you need to do that just sneaks up on you. I’m sure this has happened to the most of us. This article is about one of those that is really high on the list of the “things to fix” … Continue reading

Posted in Photography | Tagged , , | Comments Off on Rotating photos automatically