How To Upgrade Esxi 5.1 To Esxi 5.5 ?

1.	How To Upgrade Esxi 5.1 To Esxi 5.5 ?
Answer» Using vSphere UPDATE MANAGER UPGRADE INTERACTIVELY using the ESXi installer ISO image on CD/DVD or Flash DRIVE Using vSphere Auto Deploy Using esxcli command-line interface

Answer»

Using vSphere UPDATE MANAGER
UPGRADE INTERACTIVELY using the ESXi installer ISO image on CD/DVD or Flash DRIVE
Using vSphere Auto Deploy
Using esxcli command-line interface

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