After vSphere deployment, ESXi configuration and troubleshooting are the most common operations performed by vSphere Client. VMware administrators often choose the vSphere Client GUI to configure the ESXi host. However, they sometimes choose the command line for configuration or maintenance tasks, for example, esxcli, vicfg, and vmware-cmd commands. This is because some logs or information about the vSphere host cannot be found using vSphere Client. VMware vSphere Management Assistant (vMA) is a useful tool, and it is used to interact with ESXi hosts and vCenter Server. For example, you can add the ESXi host or vCenter Server to vMA, and then manage the individual ESXi host or virtual machine using vMA's commands.

During troubleshooting, we need to know how to gather the log files of ESXi and vCenter Server, and where we can find the related system log, for example, the VMkernel, warring message, management agent, the esxupdate...