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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!

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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

Search and replace in multiple files and save them with the same names - quickly and effectively!

Terminal - Search and replace in multiple files and save them with the same names - quickly and effectively!
for files in $(ls -A directory_name); do sed 's/search/replaced/g' $files > $files.new && mv $files.new $files; done;
2009-05-07 20:13:07
User: bassu
Functions: ls mv sed
Search and replace in multiple files and save them with the same names - quickly and effectively!

Yeah, there are many ways to do that.

Doing with sed by using a for loop is my favourite, because these are two basic things in all *nix environments. Sed by default does not allow to save the output in the same files so we'll use mv to do that in batch along with the sed.


There are 7 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

why not use sed -i ?

for files in $(ls -A directory_name); do sed -i 's/search/replaced/g' $files; done;

Comment by thebillywayne 420 weeks and 1 day ago

Good catch thebillywayne. Thanks.

Comment by bassu 420 weeks and 1 day ago

You can also trigger sed through 'find's exec function:

find . -name "*.php" -exec sed -i 's/old/new/g' {} \;

Comment by birnam 420 weeks and 1 day ago

there's a command called replace that does this:

replace 'word' 'another word' -- *

From the man page:


replace - a string-replacement utility


replace arguments


The replace utility program changes strings in place in files or on the

standard input.

Invoke replace in one of the following ways:

replace from to [from to] ... -- file [file] ... replace from to [from to] ... < file
Comment by bunedoggle 420 weeks ago

the 'replace' program that bunedoggle mentioned is part of the mysql-server-5.0 package, at least on my debian/ubuntu system.

Comment by bwoodacre 419 weeks and 5 days ago

"sed -i" isn't available on every UNIX system, as it's a GNU extension only.

Comment by realist 405 weeks and 2 days ago

Your point of view

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