commandlinefu.com is the place to record those command-line gems that you return to again and again.
Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.
If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/
You can sign-in using OpenID credentials, or register a traditional username and password.
First-time OpenID users will be automatically assigned a username which can be changed after signing in.
Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10
Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):
Subscribe to the feed for:
Resizes all images in the curent directory to x resolution.
It is better than `mogrify -resize *.jpg` because of independence from extension of image (e.g. .jpg and .JPG) (:
There are 3 alternatives - vote for the best!
If you can do better, submit your command here.
You must be signed in to comment.
`ls` is bug-prone, just use *
if you care about case, use *.[jJ][pP][gG] or more sanely,
find . -maxdepth 1 -iname '*.jpg' | while read a; do convert ...; doneYou don't need ls to discover files. By default your shell should expand `*` to every file name, or `*.jpg` to every jpg file in the current directory. Here's another way based on eichin's version:
find . -maxdepth 1 -iregex ".*\.jpe?g" -exec convert {} -resize WxH {} \;will match jpg/JPG/jpeg/JPEG.
Notice that if you are using linux (don't know about Win) only the solution proposed by bwoodacre will work for filenames with a space inside.
I just found it. Wouldn't be better to use mogrify?
mogrify -sample 50% *.jpg