Update sudoers troubleshooting guide 🦢

Author: blakedrumm

articles/update-manager/troubleshoot.md

@@ -270,10 +270,27 @@ The property should be set to true to allow extensions to work properly.
 
 #### Issue
 
-Sudo privileges are not granted to the extensions for assessment or patching operations on Linux machines.
+Sudo privileges are not granted to the extensions for assessment or patching operations on Linux machines. You may see the following exception:
+```
+EXCEPTION: Exception('Unable to invoke sudo successfully. Output: root is not in the sudoers file. This incident will be reported. False ',)
+```
+
+Azure Update Manager (*AUM*) requires a high level of permissions due to the many different components that may be updated with AUM (*Kernel drivers, OS Security Patching, etc.*). The AUM extension uses the `root` account for operations.
 
 #### Resolution
-Grant sudo privileges to ensure assessment or patching operations succeed. 
+Grant sudo privileges to ensure assessment or patching operations succeed. You will need to add the root account to the sudoers file.
+
+1. Open the sudoers file for editing:
+   ```bash
+   sudo visudo
+   ```
+
+2. Add the following entry to the end of `/etc/sudoers` file:
+   ```
+   root ALL=(ALL) ALL
+   ```
+
+3. When done, save and exit the editor using the `Ctrl-X` command. If you are using the *vi* editor you can type `:wq` and press <kbd>⏎ ENTER</kbd>.
 
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