Well, many of us has encountered the issue of VM hung status whether it’s a Windows or Linux machine.  Most of the time system admin use to restart the VM to recover from the hung state. Now, the question comes how can we identify the cause of the VM hung. Yes, we can check the same in vmware.log of that particular Virtual machine but that will give only limited information. What if we can get the memory dump of that VM to know the actual cause of hung. So, to get the memory dump of the VM we first need to get .vmss file of that VM. To get the .vmss file we need to suspend the VM by going into edit setting of the VM and select suspend VM option. Now, into the datastore inside VM folder you will find a new file which is called .vmss . Now, its quite difficult to read the .vmss file .  Now to extract it and convert it into core dump (memory dump) you can use one VMware fling tool ( Vmss2core ). Vmss2core will convert the .vmss file to coredump (memory dump) and

This article states how to change the system name or the FQDN of the vCenter appliance 6.x You may not find any way to change the FQDN from the vCenter GUI either from VAMI page of from webclient as the option to change the hostname always be greyed out. Now the option left is from the command line of VCSA appliance. Below steps will make it possible to change the FQDN of the VCSA from the command line. Access the VCSA from console or from Putty session. Login with root permission Use above command in the command prompt of VCSA : /opt/vmware/share/vami/vami_config_net Opt for option 3 (Hostname) Change the hostname to new name Reboot the VCSA appliance.   After reboot you will be successfully manage to change the FQDN of the VCSA . Note: Above step is unsupported by VMware and may impact your SSL certificate and face problem while logging to vSphere Web Client. If you are using self-signed certificate, you can regenerate the certificate with the