Fix command syntax for SSH permissions in documentation

Corrected the command syntax for changing SSH permissions in multiple sections of the document.

Author: Mauricio

support/azure/virtual-machines/linux/troubleshoot-ssh-permissions-too-open.md

@@ -46,8 +46,8 @@ If the [VM agent](../windows/windows-azure-guest-agent.md#step-1-check-whether-t
 1. Sign in to the [Azure portal](https://portal.azure.com), and then go to the VM page.
 1. In the **Operations** section, select **Run Command** > **RunScriptShell**, and then run the following script. Replace `<username>` with your user name.
 
-    ``` bash
-    chmod –R 644 /etc/ssh
+    ```bash
+    chmod -R 644 /etc/ssh
     chmod 600 /etc/ssh/ssh_host*key
     chmod 600 /etc/ssh/sshd_config
     chmod 755 /home/<username>
@@ -62,8 +62,8 @@ If the [VM agent](../windows/windows-azure-guest-agent.md#step-1-check-whether-t
 1. Connect to the VM by using Azure Serial Console, and log on to your account.
 1. Run the following command to restore the appropriate permissions to the configuration directory and the files. Replace `<username>` with your user name.
 
-    ``` bash
-    chmod –R 644 /etc/ssh
+    ```bash
+    chmod -R 644 /etc/ssh
     chmod 600 /etc/ssh/ssh_host*key
     chmod 600 /etc/ssh/sshd_config
     chmod 755 /home/<username>
@@ -100,7 +100,7 @@ If you can't access the VM by using the Azure Serial Console, then the repair mu
 
 1. Restore the appropriate permissions to the configuration directory and files. Replace `<username>` with your user name.
 
-    ```
+    ```bash
     chmod –R 644 /repair/etc/ssh
     chmod 600 /repair/etc/ssh/ssh_host*key
     chmod 600 /repair/etc/ssh/sshd_config
@@ -113,7 +113,7 @@ If you can't access the VM by using the Azure Serial Console, then the repair mu
 
 1. Unmount the boot partition:
 
-    ```
+    ```basg
     umount /repair
     ```