When I first switched to Linux, I also attempted to switch to Gimp—which is generally considered to be Linux’s Photoshop. My experience with Gimp, especially versions before 2.5, was not great, and I switched back to Photoshop pretty quickly.

One of my freelance clients publishes a newsletter every month, and I convert the PDF into JPG images to use on the site as a sort of low-fi online version. I discovered pretty quickly that Gimp’s conversion routines did a terrible job. Eventually, I found a solution using ImageMagick, which I had used previously in my bipolar gallery scripts.

Converting images is super easy with ImageMagick’s convert command, and as it turns out, convert can also handle PDF files.

Here’s the commandline I use:

convert -density 300 -size 4100 sourcefile.pdf -quality 100 outputfiles.jpg

Basically, this converts each page of the pdf into a 300ppi JPG with a maximum dimension of 4100 pixels and a JPG quality setting of 100% (or no compression). Each page is saved as an individual JPG named outputfilesXX.jpg (where XX represents the page number, starting at 00).

This gives me much higher-quality starting images than Gimp provided, which I can then resize as needed.

convert has a huge array of features beyond this simple example, and is worth a look if you need to do image manipulation from a script, or batch operations on images from the commandline.

If there’s one thing I’ve learned about becoming a more productive computer user, it’s this: keyboard shortcuts are the holy grail. In my average workday, I would guess that I could shave over an hour off my time on a lengthy project, just by learning and judiciously applying keyboard shortcuts.

Obviously, this will be most effective for people who already spend most of their time with their fingers on the home row (writers & coders), but many of the best mouse-centric programs often have single-letter or one-handed shortcuts that are very beneficial.

Though I’m planning to write a few posts dealing with specific applications that I use every day, and my favorite or most frequently used shortcuts in those applications, there is also quite a bit that is available by default in most modern operating systems. In this post, I’m going to try to give you a few common shortcuts that will work on Windows, Mac OS X, and Linux.

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I’m going to kick off the Linux Toolbox with a relatively simple one.

Command: alias
Purpose: create command-line shortcuts
Benefit: save time and effort by simplifying complicated, commonly-executed commands.

If you spend any time at the Linux command-line, chances are that you are going to type the same commands repeatedly. Or, there may be long or complex commands that you enter only rarely, but you don’t want to have to look up every time you need them.

Alias allows you create temporary command shortcuts within the current terminal session.

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I don’t remember when I first heard about Linux, or even Unix, but I do know it was a long time ago. My first impression was that Unix was an OS for mainframes and comp. sci majors. When I learned that it was capable of multitasking and running a GUI, my brain nearly fell out. Years later, when I learned of Linux, I got basically the same impression—it seemed like trying to run a mainframe OS on a little desktop box.

At a time when I was spending countless hours of my life endlessly tweaking my Amiga and whatever crap PC I had on hand, or trying to devise the perfect partition/directory structure, spending 3 hours compiling something just to get the machine to boot up seemed like a colossal waste of time. As time went on, the idea of Linux as desktop OS was becoming less ridiculous, but there still seemed to be a giant learning curve. It was hard enough keeping Amiga and DOS cli commands and syntaxes straight, much less learning an entirely new one!

A few years ago, I finally got a Macbook at work, running OS X, which is Unix based. As I learned more about the Mac—and kept running into brick walls of broken or missing functionality—I started to dig into the command-line. I got a little more comfortable with it as time went on, to the point where I was seriously considering a personal switch to OS X, and finally ridding myself of an unfortunate dependence on Windows.

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