2-Cent Tips
Two-cent Tip: efficient use of "-exec" in find
Mulyadi Santosa [mulyadi.santosa at gmail.com]
Sun, 31 Jan 2010 16:39:55 +0700
Most CLI aficionados use this kind of construct when executing a command over "find" results:
$ find ~ -type f -exec du -k {} \;
Nothing is wrong with that, except that "du" is repeatedly called with single argument (that is the absolute path and the file name itself). Fortunately, there is a way to cut down the number of execution:
$ find ~ -type f -exec du -k {} +
Replacing ";" with "+" would make "find" to work like xargs does. Thus du -k will be examining the size of several files at once per iteration.
PS: Thanks to tuxradar.com for the knowledge!
-- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com
[ Thread continues here (2 messages/1.80kB) ]
Two-cent Tip: creating scaled up/down image with ImageMagick
Mulyadi Santosa [mulyadi.santosa at gmail.com]
Wed, 30 Dec 2009 11:42:36 +0700
Wants a quick way to scale up/down your image file? Suppose you want to create proportionally scaled down version of abc.png with width 50 pixel. Execute:
$ convert -resize 50x abc.png abc-scaled.png
-- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com
