Hide

What's this?

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/

Get involved!

You can sign-in using OpenID credentials, or register a traditional username and password.

OpenID
or
Sign in Register

First-time OpenID users will be automatically assigned a username which can be changed after signing in.

Hide

Stay in the loop…

Follow the Tweets.

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

Subscribe to the feeds.

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:

Hide

News

2011-03-12 - Confoo 2011 presentation
Slides are available from the commandlinefu presentation at Confoo 2011: http://presentations.codeinthehole.com/confoo2011/
2011-01-04 - Moderation now required for new commands
To try and put and end to the spamming, new commands require moderation before they will appear on the site.
2010-12-27 - Apologies for not banning the trolls sooner
Have been away from the interwebs over Christmas. Will be more vigilant henceforth.
2010-09-24 - OAuth and pagination problems fixed
Apologies for the delay in getting Twitter's OAuth supported. Annoying pagination gremlin also fixed.
Hide

Tags

Hide

Functions

Hide

Credits

Site by David Winterbottom (user root).

Change the extension of a filename by using rename to convert

Terminal - Change the extension of a filename by using rename to convert
rename .JPG .jpg *.JPG
2009-03-10 15:07:24
User: psytek
Functions: rename
3
Up
Down
Change the extension of a filename by using rename to convert

This will change all files ending in .JPG to .jpg and will work with any file extension

Add to favourites | Report as malicious

Alternatives

There is 1 alternative - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

It seems, after poking around under ubuntu, if you have perl installed, invoking 'rename' will actually invoke a perl script intended to improve on the behavior of the 'normal' rename utility provided by util-linux-ng, and typing the command as listed above will result in a weird error. To invoke the non-perl version (I've only checked under ubuntu), try

rename.ul .JPG .jpg *.JPG

To more permanently restore the non-perl rename, edit the symbolic link /etc/alternatives/rename to point to /usr/bin/rename.ul

Comment by bwoodacre 222 weeks and 6 days ago

to rename *.JPG or JpG or jPg and so... to *.jpg

rename 'y/A-Z/a-z/' *.[jJ][pP][gG]
Comment by oops66 222 weeks and 1 day ago

@ bwoodacre

'which rename' will tell you the location, so you can call it like this:

/usr/bin/rename .JPG .jpg *.JPG

That's why you should use full paths if you want to make the scripts portable.

Comment by karol 135 weeks and 1 day ago

Your point of view

You must be signed in to comment.

Related sites and podcasts