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

recurisvely md5 all files in a tree

Terminal - recurisvely md5 all files in a tree
find ./backup -type f -print0 | xargs -0 md5sum > /checksums_backup.md5
2009-02-12 19:39:12
User: hooobs
Functions: find md5sum xargs
6
recurisvely md5 all files in a tree

Know a better way?

If you can do better, submit your command here.

What others think

find ./backup -type f -exec md5sum '{}' ';'

Comment by zb 270 weeks and 3 days ago

zb: that's going to be much slower.

Comment by wwest4 270 weeks and 3 days ago

wwes4, 1st one can be error, if there is many files on the tree.

Comment by zb 270 weeks and 3 days ago

find ./backup -type f |perl -p -e 's/\n//;$l=$l+length($_); if ($l > 1024) {print "\nmd5sum ";$l=0};print " \047$_\047 ";$_=""' |sh

my long dirty version, prevent whitespacing, long commandlines

Comment by zb 270 weeks and 3 days ago

...or you could just use xargs -0, which works like a charm against any number of files (try it with find / if you don't believe it).

Comment by wwest4 270 weeks and 3 days ago

thanks! clear now.

Comment by zb 270 weeks and 3 days ago

If this is the wrong place for this request, please redirect me to the correct spot.

I'm new to Unix and took over a script that has the command "find . -type f -print | xargs -0 md5sum > md5sum.txt" in it. However it errors saying the '0' is an illegal option. How can I correct this command so it works again? I am on a Sun Solaris 10 system.

Comment by wagneti 245 weeks and 3 days ago

Would work better with an append redirect...

find ./backup -type f -print0 | xargs -0 md5sum >> /checksums_backup.md5
Comment by realist 243 weeks and 4 days ago

Your point of view

You must be signed in to comment.

Related sites and podcasts