---
title: "show upgrade_history"
canonical: "https://docs.infoblox.com/space/nios86/35759055/show%20upgrade_history"
format: markdown
---
The `show`` ``upgrade_history`` `command displays the upgrade history of the NIOS appliance, showing how many times the appliance has been upgraded and the versions for each upgrade. It also shows the revert version—the version that you can go back to—which is the version of the software the appliance was (last) running prior to the most recent upgrade.

# Syntax

`show upgrade_history`

This command has no arguments.

# Example

`Infoblox > ``show upgrade_history`  
`REVERT version is: 4.0r1`  
`[2006/08/14 19:05:48] Upgraded to: 4.0r2-4-06070517`