Update troubleshooting doc

Author: sdwheeler

articles/cloud-shell/troubleshooting.md

@@ -84,8 +84,8 @@ This article covers troubleshooting Cloud Shell common scenarios.
 
 - **Details**: Cloud Shell uses a container to host your shell environment, as a result running
   the daemon is disallowed.
-- **Resolution**: Utilize [docker-machine][04], which is installed by default, to manage docker
-  containers from a remote Docker host.
+- **Resolution**: Use the [docker CLI][04], which is installed by default, to remotely manage docker
+  containers.
 
 ## PowerShell troubleshooting
 
@@ -158,15 +158,21 @@ Cloud Shell supports the latest versions of following browsers:
 
 ### Copy and paste
 
-- Windows: <kbd>Ctrl</kbd>-<kbd>C</kbd> to copy is supported but use
-  <kbd>Shift</kbd>-<kbd>Insert</kbd> to paste.
+- Windows: <kbd>Ctrl</kbd>+<kbd>c</kbd> to copy is supported but use
+  <kbd>Shift</kbd>+<kbd>Insert</kbd> to paste.
   - FireFox/IE may not support clipboard permissions properly.
-- macOS: <kbd>Cmd</kbd>-<kbd>C</kbd> to copy and <kbd>Cmd</kbd>-<kbd>V</kbd> to paste.
+- macOS: <kbd>Cmd</kbd>+<kbd>c</kbd> to copy and <kbd>Cmd</kbd>+<kbd>v</kbd> to paste.
+- Linux: <kbd>CTRL</kbd>+<kbd>c</kbd> to copy and <kbd>CTRL</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd> to paste.
+
+> [!NOTE]
+> If no text is selected when you type <kbd>Ctrl</kbd>+<kbd>C</kbd>, Cloud Shell sends the `Ctrl C`
+> character to the shell. This could terminate the currently running command.
 
 ### Usage limits
 
-Cloud Shell is intended for interactive use cases. As a result, any long-running non-interactive
-sessions are ended without warning.
+Cloud Shell is intended for interactive use cases. Cloud Shell sessions time out after 20 minutes
+without interactive activity. As a result, any long-running non-interactive sessions are ended
+without warning.
 
 ### User permissions
 
@@ -283,6 +289,6 @@ Azure Cloud Shell in Azure Government is only accessible through the Azure porta
 > Connecting to GCC-High or Government DoD Clouds for Exchange Online is currently not supported.
 
 <!-- link references -->
-[04]: https://docs.docker.com/machine/overview/
+[04]: https://docs.docker.com/desktop/
 [05]: persisting-shell-storage.md#mount-a-new-clouddrive
 [06]: /powershell/microsoftgraph/migration-steps