SSH: connect with public key avoiding passphrase prompt

Question

root@myhost:/# ssh -i /opt/id_rsa.pub azureuser@myhost2.cloudapp.net
Enter passphrase for key '/opt/id_rsa.pub':
azureuser@myhost2.cloudapp.net's password:

I have created key pair without passphrase, is it possible to get rid of passphrase prompt while connecting to remote server?

I would like to use key connection while using this command:

tar -c /opt/lampp/htdocs/somehost | ssh -i /opt/id_rsa.pub azureuser@myhost2.cloudapp.net 'tar -xvf - -C /opt/somefolder' > /dev/null 2>&1 &

So that files transfer continue even if terminal have lost connection.

See: http://serverfault.com/questions/182322/why-does-my-ssh-passphrase-work-with-plink-and-not-ssh/182324#182324 — Zoredache, Jan 05 '13 at 23:14
Based on your output the passphrase is being ignored and is falling back to password authentication. It looks like there is a problem with your converted key if you believe it to have no passphrase. — James O'Gorman, Jan 06 '13 at 11:27

score 2 · Accepted Answer · answered Jan 05 '13 at 22:29

2

You can remove (or change) the passphrase using the -p option to ssh-keygen. For example:

ssh-keygen -f /opt/id_rsa -p

Press Enter at the new passphrase prompt to remove the passphrase.

answered Jan 05 '13 at 22:29

Michael Hampton

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I haven't passphrase in the first place. Like i said, i have used windows putty keygen and generated keys without passphrase. – Somebody Jan 05 '13 at 22:31
After ssh-keygen -f /opt/id_rsa.pub -p i'm getting this: Enter old passphrase: Bad passphrase. – Somebody Jan 05 '13 at 22:33
Then you need to enter the _correct_ passphrase, or use some utility which generates correct keys (like `ssh-keygen`). – Michael Hampton Jan 05 '13 at 22:35
The fact is, that i use these keys to connect via putty and it doesn't ask me for passphrase... – Somebody Jan 05 '13 at 22:40
@Somebody how did you convert the keys from putty's format to ssh's format? – DerfK Jan 06 '13 at 00:08
Yea i guess i have converted them somehow. I don't remember already... – Somebody Jan 06 '13 at 10:38

SSH: connect with public key avoiding passphrase prompt

1 Answers1