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  1. Restarting the Management agents in ESXi 
  2. Uploading files to a vSphere service might fail 
  3. “503 service unavailable” error when connecting to the vCenter Server using the vSphere Web Client
  4. How to reset the lost or forgotten root password in vCenter Server Appliance 6.5 & 6.7
  5. Investigating virtual machine file locks on ESXi
  6. L1TF related “esx.problem.hyperthreading.unmitigated” vCenter Server Updates: CVE-2018-3646
  7. Troubleshooting an ESXi/ESX host in non responding state
  8. Unable to log in to the root account of vCenter Server Appliance 5.5 & 6.0
  9. Virtual machine application runs slower than expected in ESXi
  10. Unable to Locate the ISO Image for the VMware Tools Installation
  11. Cannot power on a VM because the virtual disk cannot be opened
  12. Multiple attempts to log in to an ESXi host with incorrect credentials might cause the hostd service to stop responding (CVE-2019-5528)
  13. System logs are stored on non-persistent storage
  14. ESXi host disconnects intermittently from vCenter Server
  15. Cannot create a quiesced snapshot because the snapshot operation exceeded the time limit for holding off I/O in the frozen virtual machine
  16. Powering on a virtual machine fails with the error: Cannot open the disk
  17. Troubleshooting virtual machine console and MKS issues in the vSphere Client
  18. Troubleshooting ESX/ESXi virtual machine performance issues
  19. VLAN configuration on virtual switches, physical switches, and virtual machines
  20. HA error: “The number of heartbeat datastores for host is 1, which is less than required: 2”