docs/Workflows/Linux/ProxmoxVE/Upgrade PVE from 8 to 9.md

Purpose

There are a few steps you have to take when upgrading ProxmoxVE from 8.4.1+ to 9.0+. The process is fairly straightforward, so just follow the instructions seen below.

!!! warning "Perform pve8to9 Readiness Check" It's critical that you run the pve8to9 command to ensure that your ProxmoxVE server meets all of the requirements and doesn't have any failures or potentially server-breaking warnings. If the pve8to9 command is unknown, then run apt update && apt dist-upgrade in the shell then try again. Warnings should be addressed ad-hoc, but CPU Microcode warnings can be safely ignored.

**Example pve8to9 Summary Output**:
```sh
= SUMMARY =

TOTAL:    48
PASSED:   39
SKIPPED:  8
WARNINGS: 1
FAILURES: 0
```