ESXi Log Files and Locations

For troubleshooting any issue it is very important to locate and analyse the logs let's have a look at log with there location and use.

Log	Description
/var/log/auth.log	ESXi Shell authentication success and failure
/var/log/dhclient.log	DHCP client service, including discovery, address lease requests and renewals
/var/log/esxupdate.log	ESXi patch and update installation logs
/var/log/lacp.log	Link Aggregation Control Protocol logs
/var/log/hostd.log	Host management service logs, including virtual machine and host Task and Events, communication with the vSphere Client and vCenter Server vpxa agent, and SDK connections
/var/log/hostd-probe.log	Host management service responsiveness checker
/var/log/rhttproxy.log	HTTP connections proxied on behalf of other ESXi host webservices
/var/log/shell.log	ESXi Shell usage logs, including enable/disable and every command entered
/var/logsysboot.log	Early VMkernel startup and module loading
/var/log/boot.gz	A compressed file that contains boot log information
/var/log/syslog.log	Management service initialization, watchdogs, scheduled tasks and DCUI use
/var/log/usb.log	USB device arbitration events, such as discovery and pass-through to virtual machines
/var/log/vobd.log	VMkernel Observation events
/var/log/vmkernel.log	Core VMkernel logs, including device discovery, storage and networking device and driver events, and virtual machine startup
/var/log/vmkwarning.log	A summary of Warning and Alert log messages excerpted from the VMkernel logs
/var/log/vmksummary.log	A summary of ESXi host startup and shutdown, and an hourly heartbeat with uptime, number of virtual machines running, and service resource consumption
/var/log/Xorg.log	Vide acceleration