Upgrade ESXi 4.0 to ESXi 4.1

1. You need CLI – Download Here

For or Linux and install on your .

. Download the Upgrade Package for 4.0 to 4.1

3. Power off your 's and put the host into maintenance mode

4. From the vSphere CLI prompt

vihostupdate.pl – hostname or IP -i –b d:\downloads\upgrade-from-ESXi4.0-to-4.1.0-0.0.260247-release.zip -B ESXi410-GA

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