Differences

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--- remote_access [2019/10/14 12:33] – [Passwordless Authentication] kameranis
+++ remote_access [2025/01/13 13:55] (current) – amcguire
@@ Line 10: / Line 10: @@
 === linux.cs.uchicago.edu ===
-This is actually uses DNS round robin to point to multiple servers:
+The ''linux.cs.uchicago.edu'' name is an alias that points to the ''focal.cs.uchicago.edu'' name, which in turn cycles round-robin through the following canonical names:
-  * linux1.cs.uchicago.edu
+  * ''focal0.cs.uchicago.edu''
-  * linux2.cs.uchicago.edu
+  * ''focal1.cs.uchicago.edu''
-  * linux3.cs.uchicago.edu
+  * ''focal2.cs.uchicago.edu''
+  * ''focal3.cs.uchicago.edu''
+  * ''focal4.cs.uchicago.edu''
+  * ''focal5.cs.uchicago.edu''
+  * ''focal6.cs.uchicago.edu''
+  * ''focal7.cs.uchicago.edu''
 === Specs ===
@@ Line 143: / Line 148: @@
 keychain, by default, is quite verbose. Once you are sure that it is working the way you intend, add a -q option onto the keychain invocation to silence it.
+====== PHD Desktops ======
+Some desktops will require you to use a jump host to get ssh access.
+<code>
+ssh -J <cnetid>@focal0.cs.uchicago.edu <cnetid>@<host>.a.cs.uchicago.edu
+</code>
+You will want to setup ssh keys in your home directory or you it will ask for your password twice:
+<code>
+$ ssh -J cnetid@focal0.cs.uchicago.edu cnetid@<host>.a.cs.uchicago.edu
+cnetid@focal0.cs.uchicago.edu's password:
+cnetid@<host>.a.cs.uchicago.edu's password:
+cnetid@<host>:~$
+</code>
+If you haven't done so already you'll need to generate ssh keys:
+<code>
+cnetid@focal0:~$ ssh-keygen -t ed25519
+Generating public/private ed25519 key pair.
+Enter file in which to save the key (/home/cnetid/.ssh/id_ed25519):
+Created directory '/home/cnetid/.ssh'.
+Enter passphrase (empty for no passphrase):
+Enter same passphrase again:
+Your identification has been saved in /home/cnetid/.ssh/id_ed25519.
+Your public key has been saved in /home/cnetid/.ssh/id_ed25519.pub.
+The key fingerprint is:
+...
+</code>
+<code>
+cnetid@focal0:~$ cat $HOME/.ssh/id_ed25519.pub >> $HOME/.ssh/authorized_keys
+</code>
+# success! we can ssh without a password.
+<code>
+cnetid@focal0:~$ ssh focal1
+Last login: Sat May 18 21:57:18 2019 from 73.208.67.252
+cnetid@focal1:~$
+</code>