If you need to do some more advanced find commands that use regex this should help. Make sure to compress your images with lossless ( guide) or lossy compression ( guide). You can use the top command and look for jpegoptim processes once in a while.Ĭheck the folder size again du -sh foldername
#COMMAND LINE IMAGE RESIZE INSTALL#
sudo apt-get install screenĬreate a new screen session, press space or enter at the intro screen screenĮxecute the script bash ~/scripts/batch-image-resize.shĭetach the screen with Ctrl+A and pressing D (detach). Screen will ensure the batch command keeps on running even if your SSH session is terminated. #resize png or jpg to either height or width, keeps proportions using imagemagick It will overwrite your original images so make sure you have a backup before running this!įOLDER="/var/www//wp-content/uploads" > means that it will never enlarge the input image, e.g. WIDTH is the max width and HEIGHT is the max height. resize 100x50> resizes to fit in a 100x50 box keeping the aspect ratio. Paste the script below, remember to change the FOLDER variable!įOLDER is the absolute path to your image folder Now we can move on to batch resizing Batch Resize Images with Linux with ImagemagickĬreate the following script mkdir -p ~/scripts Note that this overwrites your original image! convert image.jpg -resize 600x400\> image.jpgĬheck the image was resized identify -format "%wx%h" image.jpg This will automatically preserve the aspect ratio of the image too. You can resize the image if it is larger than the specified dimensions. The execution of this CmdLet creates a new file named 'OriginalNameresized' and maintains the original: file extension.PARAMETER Width: The new width of the image. You will see the resolution, width is first then height. Resize an image.DESCRIPTION: Resize an image based on a new given height or width or a single dimension and a maintain ratio flag. We can use the identify command to get the width ( %w) and height ( %h) identify -format "%wx%h" image.jpg Batch Resize Images using Linux Command Line and Imagemagickįirst we need to install Imagemagick from the repository on Debian or Ubuntu sudo apt-get update If you want to install Imagemagick on CentOS see this guide.
#COMMAND LINE IMAGE RESIZE HOW TO#
This guide shows you how to batch resize jpg and png files using Imagemagick on Ubuntu or Debian. If you never had any image size restrictions or automatic resizing on your site, it can be extremely convenient to batch resize those images in Linux. The most common culprit is image size or lack of compression. Large images means a large page size which means slow WordPress page load times for users.
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