In today’s post I’m going to show how to embed a text message into an image file. This type of messaging is known as steganography. Steganography is the practice of hiding secrets in such a way that only the intended message recipient would know to look for your hidden message. In this basic form of …
Continue reading How To Hide Secret Messages In Images With Linuxcommand line
Today I’m going to show you how to use the head and tail commands to view portions of text files. There are, of course, other commands that can be used to view text files. The cat command can be useful for viewing small text files while more and less can be good for larger files. …
Continue reading Command Line Basics: head And tailAs smart phones are becoming more pervasive, 2D bar codes are starting to appear all over the place. The QR Code format is one of the most commonly used styles of these matrix bar codes. These QR Codes often contain a URL to send a smart phone user to a particular web site, but all …
Continue reading Create Your Own QR Codes on LinuxA while back I wrote a post on how to remove old kernels from your Ubuntu system. While that process works just fine, it is a four step process. One person who read that post left a comment with a nice command line one-liner that removes all but the currently running kernel. And while that …
Continue reading Remove Old Kernels In Ubuntu With One CommandIn the previous installments of Command Line Basics: Ripping Audio CD’s, I’ve gone through ripping CD’s and saving the files as WAV files, transcoding those files to Ogg Vorbis audio, and finally, querying an online CD database tagging those Ogg files. I the last installment, I promised to show a more automated way to do …
Continue reading Command Line Basics: Ripping Audio CD’s, Part 4