Command Line Basics: View Image EXIF Data
Filed under: command line, HowTo, image editing, linux, Ubuntu
I've got a huge number of digital photos on my computer that need to be organized. What I would like to do is sort the pictures by the date they were taken. The first step to sorting the pictures is to know the date they were taken. As long as the clock is properly set on your camera, your pictures should have the correct date and time of the photo stored in the image's EXIF data. You can view an image's EXIF data using the identify command. Read more
Command Line Basics: Change Your Password
Hopefully by now you understand the need to have a strong password for your computer login. Perhaps you selected your password when you first installed GNU/Linux and you've never changed it. Maybe you don't even know how to change it. Today I'll show you how to change your password from the command line. Read more
Listing And Killing Tasks From The Command Prompt In Windows
Most Linux users are familiar with using the ps and kill commands from the Linux terminal to list and kill processes. Many Windows users are also familiar with ending errant processes by using the Windows Task Manager. But what if Task Manager won't work? Read more
Command Line Basics: Compare Files With diff
In my job as a mechanical engineer, I work with large text files for finite element analysis models. I sometimes have to run several iterations to evaluate different design proposals and I need to check my models against the baseline to make sure that only the intended changes are included. The tool I use to compare files is diff. Read more
How To Hide Secret Messages In Images With Linux
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 secret messaging we'll be adding text onto the end of a file. I'm going to use the following image of Tux for my example. Read more
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