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

cat ~/.ssh/id_rsa.pub | ssh <REMOTE> "(cat > tmp.pubkey ; mkdir -p .ssh ; touch .ssh/authorized_keys ; sed -i.bak -e '/$(awk '{print $NF}' ~/.ssh/id_rsa.pub)/d' .ssh/authorized_keys; cat tmp.pubkey >> .ssh/authorized_keys; rm tmp.pubkey)"
This one is a bit more robust -- the remote machine may not have an .ssh directory, and it may not have an authorized_keys file, but if it does already, and you want to replace your ssh public key for some reason, this will work in that case as well, without duplicating the entry.

4
By: tamouse
2011-09-30 07:39:24

7 Alternatives + Submit Alt

What Others Think

I think it's not correct : sed -i.bak -e '/$(awk '{print $NF}' ~/.ssh/id_rsa.pub)/d' .ssh/authorized_keys; would use ~/.ssh/id_rsa.pub instead of tmp.pubkey, the one you just copied by cat | cat > tmp.pubkey sed -i.bak -e '/$(awk '{print $NF}' tmp.pubkey)/d' .ssh/authorized_keys; would be correct However it's the more robust I found, thanks !
cyberom · 570 weeks and 3 days ago
Sorry ! my mistake, awk use the one in local ! Thanks !
cyberom · 570 weeks and 3 days ago
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pugpuppies95 · 34 weeks and 2 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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