Command line upgrade of ESXi 5.1 to 5.1 U1

The reason I`ve chosen this method is not having VUM installed and also wanting to remember a bit of esxcli. The process is pretty simple:

• download the zip bundle (update-from-esxi5.1-5.1_update01.zip) and put it on a datastore accessible by all hosts (I am using a NFS share)
• check to see if the host has the datastore mounted, if not - add the datastore

~ # esxcli storage nfs list

~ # esxcli storage nfs add -H 192.168.1.1 -s /mnt/vol1-nfs -v shared1-nfs-sata

• check the host version

~ # esxcli system version get
   Product: VMware ESXi
   Version: 5.1.0
   Build: Releasebuild-799733
   Update: 0

• check the update file and see if it requires the host in maintenance mode (in this case, it does not - however since the update will request a system reboot, I think it is better to place the host in maintenance mode and have it cleaned up of VMs)

~ # esxcli software sources vib get --depot=/vmfs/volumes/shared1-nfs-sata/update-from-esxi5.1-5.1_update01.zip
...
   Maintenance Mode Required: False

• install the update

~ # esxcli software vib update --depot=/vmfs/volumes/shared1-nfs-sata/update-from-esxi5.1-5.1_update01.zip

Installation Result
   Message: The update completed successfully, but the system needs to be rebooted for the changes to be effective.
   Reboot Required: true

• reboot the system (after all VMs have been migrated to other hosts) and check the new host version

~ # reboot
...
~ # esxcli system version get
   Product: VMware ESXi
   Version: 5.1.0
   Build: Releasebuild-1065491
   Update: 1