Here’s an easy procedure to update your ESXi to the latest build using the CLI and WebUI for Client.
Step1- List latest available packages:
esxcli software sources profile list -d https://hostupdate.vmware.com/software/VUM/PRODUCTION/main/vmw-depot-index.xml | grep -i ESXi-6.5
Step2- Select latest, install and reboot:
esxcli software profile update -p ESXi-6.5.0-20171204001-standard -d http://hostupdate.vmware.com/software/VUM/PRODUCTION/main/vmw-depot-index.xml reboot
Step3- Verify latest build:
vmware -vl VMware ESXi 6.5.0 build-7388607 VMware ESXi 6.5.0 Update 1
Step4- Verify latest client build:
Check version in web ui, under help, about
Client version: 1.24.0 Client build number: 7119706 ESXi version: 6.5.0 ESXi build number: 7388607
Step5- If needed upgrade client to latest using WebUI:
http://download3.vmware.com/software/vmw-tools/esxui/esxui-signed-latest.vib