Technology Insights

How to Install a Ruby Gem Server

There are numerous reasons it is beneficial to have your own gem server including controlling the versions of various gems deployed to all of your servers. Below is a brief explanation of how to install a gem server on your local network.

1. Install Web Server: If you do not already have a web server installed then install LiteSpeed or Apache

Technology Insights

How to Batch Resize Image from Linux Shell with ImageMagick

ImageMagick is a really cool product. Not only is it open source but its very powerful tool. My goal was to figure out how to batch resize images while keeping one side 640 pixels wide. I ended up using ImageMagick’s mogrify by issuing the command below at my CentOS shell prompt.

mogrify -resize x640 *.jpg

or

mogrify -resize 640 *.jpg

Depending on which side you want to be 640 pixels. If you would like for image magic to make the largest side 640 and constrain the proportions use the following command.