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.


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.
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

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!
Hide

Top Tags

Hide

Functions

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

Copy files from one dir to another using tar.

Terminal - Copy files from one dir to another using tar.
tar cf - . | (cd /new/dir; tar xvf -)
2009-03-09 20:30:34
User: jauderho
Functions: cd tar
-1
Copy files from one dir to another using tar.

Add z to the flags to enable compression.

Alternatives

There are 2 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

Neat trick, but does this do anything a cp or rsync wouldn't?

Comment by Viaken 393 weeks and 6 days ago

What's the matter of this, apart from wasting cpu ?

Comment by CodSpirit 393 weeks and 6 days ago

If wrapped with SSH it's a useful to transfer large directories over a network without any intermediate copying, and faster than scp, such as in:

ssh [email protected] "tar cf - ." | tar xf -

The command as presented is instructive in showing how to use stdin/stdout with tar and subshells.

Comment by bwoodacre 393 weeks and 6 days ago

Well, if you are in a restricted env. (like a rescue system), it's a poor man sync. One of its advantages is copying _everything_, including special files, links, etc.

And of course, if you are doing this locally, using compression _is_ wasting cpu cycle, but not over a network.

When copying a whole file system, as an exercise for the reader, you usually want to avoid /proc, /tmp, etc..

Comment by pruneau 393 weeks and 5 days ago

the -f - is not necessary,

tar -c |(cd /new/dir;tar -x) is sufficient
Comment by elzapp 393 weeks and 5 days ago

em

tar -c |(cd /new/dir;tar -x)

is sufficient

Comment by elzapp 393 weeks and 5 days ago

I like this.

The -v option let's you see what's going on.

neat.

Comment by dopeman 344 weeks and 4 days ago

Your point of view

You must be signed in to comment.