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Copy your ssh public key to a server from a machine that doesn't have ssh-copy-id

Terminal - Copy your ssh public key to a server from a machine that doesn't have ssh-copy-id
cat ~/.ssh/id_rsa.pub | ssh user@machine "mkdir ~/.ssh; cat >> ~/.ssh/authorized_keys"
2009-02-05 19:37:56
User: DEinspanjer
Functions: cat ssh
20
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Copy your ssh public key to a server from a machine that doesn't have ssh-copy-id

If you use Mac OS X or some other *nix variant that doesn't come with ssh-copy-id, this one-liner will allow you to add your public key to a remote machine so you can subsequently ssh to that machine without a password.

Add to favourites | Report as malicious

Know a better way?

If you can do better, submit your command here.

What others think

This can also be done with ssh-copy-id.

Comment by Burn 81 weeks and 6 days ago

modded down because it absolutely duplicates ssh-copy-id

ssh-copy-id user@host
Comment by markdrago 81 weeks and 6 days ago

I would use:

scp ~/.ssh/id_rsa.pub user@machine:.ssh/authorized_keys

Comment by pixel 81 weeks and 6 days ago

Yep, what's wrong with scp?

Comment by fzero 81 weeks and 6 days ago

pixel ... have you now not just overwritten the destination servers authorized_keys?

ssh-copy-id does it all for you and as safely as possible... give it a whirl

What have you got to loose? (apart from sanity, health, job, etc)

Comment by finkployd 81 weeks and 6 days ago

it's still good for a case when your host doesn't have ssh-copy-id program, like freebsd or macosX do

Comment by codesnik 81 weeks and 6 days ago

if you forget about ssh-copy-id, I like this version better which works even on a new machine:

cat ~/.ssh/id_rsa.pub | ssh machine 'mkdir .ssh ; cat >>.ssh/authorized_keys'

to test:

ssh machine id

If it asks for a password, it's not working. Sometimes a server will disable passwordless logins.

Comment by shavenwarthog 81 weeks and 6 days ago

ssh-copy-id fails if you have running sshd in other port than 22. This method work for this situation.

Comment by starchox 76 weeks and 1 day ago

a temp solution for the workaround with ssh-copy-id for sshd in other port

ssh-copy-id '-p 12345 user@machine'
Comment by starchox 76 weeks and 1 day ago

@pixel, @fzero scp would completely replace the authorized_keys file; cat >> appends.

Comment by mfisher911 73 weeks ago

Your point of view

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