update ssh key note

- example how to access to server after ssh key created

SSH Key/Mac/cheat_sheet.md

@@ -32,10 +32,31 @@ Host work.github.com
     PreferredAuthentications publickey
     IdentityFile ~/.ssh/work
 
+# home server
+Host home.example.com
+    HostName example.com
+    User root
+    PreferredAuthentications publickey
+    IdentityFile ~/.ssh/home
+
 ```
 
+### Terminal Access
+
+`ssh <username>@<alias_host>`
+
+example:
+
+`ssh [email protected]`
+
+### Github / Bitbucket Access
+
 * In any of your project edit their remote url, example:
 
 `[email protected]:my-project/api.git`
 
-use `work.github.com` alias instead of original url `github.com`
+use `work.github.com` alias instead of original url `github.com`
+
+## Reference
+
+* [https://confluence.atlassian.com/bitbucket/set-up-additional-ssh-keys-271943168.html#SetupadditionalSSHkeys-ssh2](https://confluence.atlassian.com/bitbucket/set-up-additional-ssh-keys-271943168.html#SetupadditionalSSHkeys-ssh2)