Copy ssh Public key to Server in one line

Update (2011/02/06): you don't really need any of the commands below, you can just use the ssh-copy-id program that comes with ssh.

Here it is:

cat ~/.ssh/id_dsa.pub | ssh <a href="mailto:user@hostname">user@hostname</a> "cat - >> ~/.ssh/authorized_keys"

Apparently some people don't like this one that much. :-)

Here's an alternative:

ssh <a href="mailto:user@hostname">user@hostname</a> "echo `cat ~/.ssh/id_dsa.pub` >> ~/.ssh/authorized_keys"

It doesn't require the first cat or the pipe.

Tags: 

Comments

Nice one liner, if your using gentoo theres also a bash script that comes with ssh. /usr/bin/ssh-copy-id just in case you were unaware.

No I wasn't aware of that. Thanks. My main box is Gentoo. The particular one I was using was Ubuntu Server.

There's always scp, so no need to do whacky pipes.

scp ~/.ssh/id_dsa.pub <a href="mailto:user@hostname">user@hostname</a>:~/.ssh/authorized_keys

patrick, that only works if you don't mind wiping the authorized_keys file? I need to append a key while keeping the others.

Or if you want it to handle the directory and file maybe being there and maybe not (as well as still appending to existing ones):

cat ~/.ssh/id_rsa.pub | ssh user@hostname "mkdir -p ~/.ssh && touch ~/.ssh/authorized_keys && cat - >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys && chmod 700 ~/.ssh"

Just what I was looking for. It works just as you describe. The chmod permissions commands are a nice add.

Thanks for the command lines :)

You can't connect to non standard port with ssh-copy-id :(

If you are wanting to add your ssh key to a host to speed up logging into it then you should really have an entry in your ~/.ssh/config file:

Host machine1
 Port 2222
 User user1

This also works with sftp and scp, so makes your life much simpler.

Nice to be visiting your blog once more, it has been months for me. Well this article that ive been waited for therefore long. i want this article to finish my assignment within the faculty, and it has same topic together with your article. Thanks, nice share.
nvisiondigital.ca

I’ve read some good stuff here. Definitely worth bookmarking for revisiting. I surprise how much effort you put to create such a great informative website.
temp mail

Nice to be visiting your blog again, it has been months for me. Well this article that i've been waited for so long. I need this article to complete my assignment in the college, and it has same topic with your article. Thanks, great share.
英国整形

Add new comment