Prerequisites:

  • ESXI 7.0 U2
  • Putty
  • HPE Offline Update Bundle

Firstly, you need a copy of the appropriate ‘offline bundle’ update, below you can see this is the customised one for HPE servers.

Link:

VMware Maintenance
VMware now

Upload the offline bundle into a datastore, (that the host to be upgraded has access to) .

While in here, shut down the guest VMs on this host.

Activate SSH....

If you try to connect with an old Version of Putty, you may receive this type of message.

This can be easily solved by switching to a new version.
After that, it works again.

https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html

Source: https://kb.vmware.com/s/article/51526

Put the host into ‘maintenance mode‘.

# Activating Maintenance Mode
vim-cmd hostsvc/maintenance_mode_enter
# Change directory
cd /vmfs/volumes
ls
cd /datastore2/
ls

# Install Update
 esxcli software vib update -d /vmfs/volumes/5d1cb403-232087ea-c12e-a0d3c10673d0/VMware-ESXi-7.0.2-17630552-HPE-702.0.0.10.6.3.24-Mar2021-depot.zip
# Restarting....
reboot
# Leaving Maintenance Mode... (after SSH Reconnect)
vim-cmd hostsvc/maintenance_mode_exit

Sources:

Upgrading vSphere ESXi Hosts (Including HP and Dell) | PeteNetLive
How to upgrade ESXi host that have vendor specific VMware ESI installs on them e.g. Dell PowerEdge, HP Proliant,and IBM/Lenovo System X.
VMware ESXi updaten – Thomas-Krenn-Wiki
Updates für VMware ESXi können selbst bei der kostenlosen ESXi Hypervisor Variante einfach über die Kommandozeile eingespielt werden. In diesem Beispiel zeigen wir anhand von VMware ESXi 6.7 wie Sie Updates über die Kommandozeile einspielen.[1]