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--- cluster:public_key [2018/10/02 13:22] – created schroeder
+++ cluster:public_key [2024/11/11 17:52] (current) – removed mcloughlin
@@ Line 1: / Line 1: @@
-======Public Key Authentication======
-[[http://en.wikipedia.org/wiki/Public_key_cryptography|Public Key Authentication]] is helpful because it increases security while at the same time allowing you to log in without typing your password.  A good reference on setting up Public Key Authentication is [[http://the.earth.li/~sgtatham/putty/0.60/htmldoc/Chapter8.html|here]].
-For those of you that use openssh to login with Cygwin, [[http://inside.mines.edu/fs_home/gmurray/HowTo/sshNotes.html|here is a helpful reference]].
-=====Intra-cluster=====
-If you would like to be able to ssh between cluster machines without having to use passwords you should be able to do this when just logged in:
-<code>cd .ssh
-ssh-keygen -t rsa -b 4096 -f id_cluster_rsa</code>
-this will generate two file id_cluster_rsa (the private key) and id and ask for a password. for passwordless logins leave it blank
-<code>cat id_cluster_rsa.pub >> authorized_keys</code>
-Then you when ssh-ing between nodes, you need to tell ssh to use your identity file (private key). There are two methods
-. If you never ssh out of the cluster then
- <code>ln --symbolic id_cluster_rsa id_rsa</code>
-. If you ssh from the cluster to non-cluster machines and use different keys when connecting to different machines (a good security practice), then you can also create a ~/.ssh/config file which will use that particular key for econ hosts then you don't have to do a ssh -i
-<code> Host econ0
-  HostName econ0
-  User putyourusernamehere
-  IdentityFile ~/.ssh/id_cluster_rsa
- Host econ1
-  HostName econ1
-  User putyourusernamehere
-  IdentityFile ~/.ssh/id_cluster_rsa
- Host econ2
-  HostName econ2
-  User putyourusernamehere
-  IdentityFile ~/.ssh/id_cluster_rsa
-etc.</code>