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.

Get involved!

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.

Universal configuration monitoring and system of record for IT.

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:



May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!

Top Tags



Psst. Open beta.

Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:

  • » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
  • » If you wish to use your user account, you will probably need to reset your password.
Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

Replace square brackets to underscore in all filenames (current dir.)

Terminal - Replace square brackets to underscore in all filenames (current dir.)
perl -e 'map { $on=$_; s/\]/_/; rename($on, $_) or warn $!; } <*>;'
2009-06-11 10:09:54
User: fo0
Functions: perl
Replace square brackets to underscore in all filenames (current dir.)


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

command is wrong in at least one respect. The regex only includes the right bracket, and only the first occurrence therein. The rest of the brackets would remain. This could have been redone with a little more elegance (at least in part) with:

perl -e 'map +{ ($on,$nn)=($_,$_); $nn =~ s/\[\]/_/go; rename($on, $nn) or warn $! } <*>'

I could see more people doing it without perl tho. Such as:

for file in $(echo *|grep -E '(\[|\])'); do mv $file $(echo $file|sed -r 's/(\[|\])/_/g'); done

While I think the second is more ugly, it's shell script and more attuned to what folks around here are used to seeing.

Comment by linuxrawkstar 390 weeks and 6 days ago

Use the rename script that comes with perl, called prename. Sometimes it is also symlinked from rename. See 'man prename' for more. You could likely write your command like this:

prename 'y/[]/_/' *

my regex may be off though.

Comment by bwoodacre 389 weeks and 3 days ago

Your point of view

You must be signed in to comment.