VMware ESX 3.* Log­file Loca­tions
Hyper­Vi­sor Logs

• vmker­nel — /var/log/vmkernel
• vmk­warn­ing — /var/log/vmkwarning
• vmk­sum­mary — /var/log/vmksummary

Man­age­ment Logs

• hostd — /var/log/vmware/hostd.log
• vpxa — /var/log/vmware/vpxa.log
• HA — /var/log/vmware/aam

Con­sole OS (COS) Logs

• COS — /var/log/messages
• esx­up­date — /var/log/vmware/esxupdate.log
• boot — /var/log/vmware/esxcfg-boot.log
• webAc­cess — /var/log/vmware/webAcess
• fire­wall — /var/log/vmware/esxcfg-firewall.log
• secure — /var/log/secure

VMware vCen­ter 2.* Log­file Locations

• vCen­ter — C:\Documents and Settings\All Users\Application Data\VMware\VMware VirtualCenter\Logs
• Tom­cat — C:\Program Files\VMware\Infrastructure\VirtualCenter Server\tomcat\logs
• Capac­ity Plan­ner — C:\Documents and Settings\All Users\Application Data\VMware\VMware Capac­ity Planner\Logs
• Update Man­ager — C:\Documents and Settings\All Users\Application Data\VMware\VMware Update Manager\Logs
• Con­verter — C:\Documents and Settings\All Users\Application Data\VMware\VMware Con­verter Enterprise\Logs
• Licence Man­ager — C:\Temp\imgrd.log

Grate­fully taken from HERE