====== Command line tipps ====== ===== Resizing images ===== Unless you are doing some sort of cropping there is no reason to load up Photoshop or the Gimp. A simple command will usually suffice for almost all your image resizing needs. convert -resize 300 image.jpg image-small.jpg If you finding yourself doing lots of image resizing during the day, this command could potentially save you a LOT of time. You can even do mass image resizing. ===== Adding a Drop Shadow to an Image ===== I found myself spending a ton of time adding drop shadows to images. Using a simple command I was able to create drop shadows in seconds. convert screenshot.jpg \( +clone -background black -shadow 60×5+0+5 \) +swap -background white -layers merge +repage shadow.jpg Note: You must have Imagemagick installed for this command to work. Debian/Ubuntu users can use apt-get install imagemagick. Obviously, I don’t expect you to memorize this command. To shorten it use an alias. ===== Splice Together an MP3 ===== If you want simple MP3 splicing this command has your back: cat 1.mp3 2.mp3 > combined.mp3 ===== Clone a Hard Drive ===== DD is one the most simplistic and powerful image applications out there. dd if=/dev/hda of=/dev/hdb ===== Burn an ISO to a CD ===== Why open up K3B or some other program just to burn an ISO? Map this command to an alias and get burning. cdrecord -v speed=8 dev=0,0,0 name_of_iso_file.iso Note: You need to get the info for the ‘dev=’ part by running ‘cdrecord -scanbus’ ===== Video Conversions ===== Let’s say you want to convert an AVI to an Mpeg file: ffmpeg -i video_origine.avi video_finale.mpg Or convert an Mpeg to AVI: ffmpeg -i video_origine.mpg video_finale.avi There are all sorts of things you can do with ffmpeg. ===== Replace Words in a Text File ===== No need to open up a GUI text editor when you have sed. This command from Eric’s Wendelin’s blog will replace all instances of a color in CSS with another one. sed ’s/#FF0000/#0000FF/g’ main.css Ref: http://www.nixtutor.com/linux/7-tasks-you-shouldnt-use-a-gui-for/ {{tag>linux bash}} ~~LINKBACK~~ ~~DISCUSSION~~