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.

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

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
-3
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.

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

why not use sed -i ?

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

Comment by thebillywayne 281 weeks and 4 days ago

Good catch thebillywayne. Thanks.

Comment by bassu 281 weeks and 4 days ago

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

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

Comment by birnam 281 weeks and 4 days ago

there's a command called replace that does this:

replace 'word' 'another word' -- *

From the man page:

NAME

replace - a string-replacement utility

SYNOPSIS

replace arguments

DESCRIPTION

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 281 weeks and 3 days 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 281 weeks and 1 day ago

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

Comment by realist 266 weeks and 6 days ago

Your point of view

You must be signed in to comment.

Related sites and podcasts