What are the common pitfalls that would stop Authorised Key SSH access, and how do I find and correct for them?

Posted by Ashimema on Ask Ubuntu See other posts from Ask Ubuntu or by Ashimema
Published on 2012-03-18T12:04:51Z Indexed on 2012/03/24 17:38 UTC
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ssh

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openssh

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pam

EDIT: This question was reworked to make it more useful to the community and less specific to me.

Questions seem to come up reasonably often regarding ssh and problems with authorised keys access, but very few seem to have a clear answer anywhere;

Server keeps asking for password after I've copied my SSH Public Key to authorized_keys

ssh not accepting public key

how do I use ssh with key access in 11.10

passwordless ssh not working

So, In the communities opinion, what is the tried and tested method for getting to the bottom of such problems?

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