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

Backup of a partition

Terminal - Backup of a partition
cd /mnt/old && tar cvf - . | ( cd /mnt/new && tar xvf - )
2009-04-30 21:03:59
User: javamaniac
Functions: cd tar
3
Backup of a partition

Clone a partion with tar.

Alternatives

There are 15 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

couldn't you do this with rsync?

I found it a few days back when I was upgrading to Ubuntu Jaunty.

check the man pages its really useful.

Comment by wrongloop 381 weeks and 6 days ago

you should add -p (--preserve-permissions) to the second tar command and do not forget, hidden files in the base dir will be omitted, you can avoid this if you use the dir name instead of the '.'.

Comment by ok 381 weeks and 5 days ago

Well, if one of the file system happens to be a live one, with mounted /tmp /proc, /sys, etc... do not forget to include the exclude flag (--exclude of -X excluded_list).

As well, in case of something going wrong (file system full, murphy), putting the whole command inside () and | tail your_log_file is a good idea as well, just so you know what went on.

Otherwise, it's my favorite fs-backup command as well.

Comment by pruneau 381 weeks and 5 days ago

Importantly for tar though you probably want the preserve (-p) option and the --one-file-system option, if you really mean to clone the *partition* in which case tar will actually do what you mean.

You're not exactly cloning the partition here, you're cloning the files on the *filesystem*. To truly clone the partition you'd have to use something like

dd if=/dev/sda1 of=/dev/sda2

which would duplicate the block-for-block on-disk layout of the original filesystem. In that case you probably want the source mounted read-only.

But still this is a good command: it shows how to juggle stdin/stdout with tar, piping, and subshells.

Comment by bwoodacre 381 weeks and 5 days ago

Your point of view

You must be signed in to comment.