esxi offline update

Example of the upgrade procedure

[root@esxi:~] esxcli system maintenanceMode set --enable=true
[root@esxi:~] ls /vmfs/volumes/datastore/ESXi670-202201001.zip

[root@esxi:~] vmware -v
VMware ESXi 6.7.0 build-14320388
[root@esxi:~] esxcli software vib update --depot /vmfs/volumes/datastore/ESXi670-202201001.zip

Installation Result
   Message: The update completed successfully, but the system needs to be rebooted for the changes to be effective.
   Reboot Required: true
   VIBs Installed: VMW_bootbank_brcmfcoe_11.4.1078.26-14vmw.670.3.159.18828794, VMW_bootbank_ixgben_1.7.1.16-2vmw.670.3.104.16075168, VMW_bootbank_lpfc_11.4.33.26-14vmw.670.3.104.16075168, VMW_bootbank_net-e1000_8.0.3.1-5vmw.670.3.112.16701467, VMW_bootbank_net-vmxnet3_1.
...
lugin_1.0.0-9vmw.670.0.0.8169922, VMware_bootbank_lsu-lsi-mpt2sas-plugin_2.0.0-7vmw.670.0.0.8169922, VMware_bootbank_qlnativefc_3.1.8.0-5vmw.670.3.73.14320388, VMware_bootbank_rste_2.0.2.0088-7vmw.670.0.0.8169922
[root@esxi:~] 
[root@esxi:~] reboot 

[root@esxi:~] vmware -v
VMware ESXi 6.7.0 build-19195723
[root@esxi:~] esxcli system maintenanceMode set --enable=false
[root@esxi:~]