Techie: 2018

Interview Questions

If ESXi host is down, what u will do

Esx Host Not Responding Error

1…Ping the ip of the esxi host. It will ping…

2…Login using putty & use this command

# service mgmt-vmware restart (Restart the mgmt-vmware service )

3…If still problem …then kill the process

# ps -ef | grep hostd

This will output a list of processes .

root 23955 1 0 10:42 pts/1 00:00:00 /bin/sh /usr/bin/vmware-watchdog -s hostd

–u 60 -q 5 -c /usr/sbin/vmware-hostd-support /usr/sbin/vmware-hostd -u
root 23961 23955 4 10:42 ? 00:00:15 /usr/lib/vmware/hostd/vmware-hostd

The first process is using the vmware-watchdog,

The second line is using hostd . kill the process.

virtual machines will run so don’t worry about that.

# kill -9 23961

Now the hostd service will start and after a few seconds

Host and virtual machines will be up in vCenter.

4…If you can’t kill or restart services.. Then reboot the ESXi host...

If ESXi hosts Disconnected Error.

1… Right click the esxi host  Reconnect.

2….If not connecting… ping the ip add of host & vCenter.

3.… Open Putty … enter these commands service mgmt-vmware restart (restarts host agent (hostd) on vmware esx server) service vmware-vpxa restart (restarts Vcenter agent service) service network restart (restarts management networks on ESX)

4…Remove the ESX/ESXi host from the vCenter Inventory.

Add the ESX/ESXi host back to vCenter Inventory.

Restart the ESXi Management Agents resolves the issue.

3…If VCenter is down, what will happen, How will you Troubleshoot

1…If vCenter is down, hosts and virtual machines are not affected

2…HA, FT will work

3…DRS do not work

How HA works

HA will work, because HA agent running on each host and the hosts monitor each other

and keep lists of running VMs that has to be restarted in case of a host failure. VCenter is

Just used to configure HA and De-activate.

Why DRS Do not work

DRS will NOT work without vCenter, because vMotion recommendations are computed

by the vCenter service, and it also initiates the migration processes

How will you Troubleshoot

# Go to services Restart VMware Virtual Center Server service

# If not starting Restart the SQL Server service  Restart Virtual Center Server service

# verifies SQL server database connectivity. (Check ODBC Connection test)

# verifies SQL server space, clear old unwanted logs and creates space.

# Defragment Database if the database is heavily fragmented vCenter Server may not start.

# Verify the VMware Virtual Center Service is running with proper login & pwd.

# Verify that critical folders exist on the vCenter Server host.

Note: In Windows 2008 (64-bit), these folders are located at:

C:\ProgramData\VMware\VMware VirtualCenter\sysprep

C:\ProgramData\VMware\VMware VirtualCenter\docRoot\diagnostics

# Verify that no hardware or software changes made to the vCenter server that created the

problem. If any changes made recently uninstall those H/W or S/W

# Stop IIS service in the vCenter server, and then restart vCenter service.

# VCenter logs are vpxd logs will help.

Windows 2008 located at C:\ProgramData\VMware\VMware VirtualCenter\Logs

4… Unable to Power on a VM, what will u do?

# Problem with storage

# Not enough RAM or CPU to power on the vm

# Problem with corrupted vmx file, VM files not accessible.

# Swap file locked by another process

5…Unable to Power off a VM...What u will do

# Check the running processes and Kill

First find the Id. to get a list of running vms, to find World ID, UUID, and Display Name

the command is

esxcli vm process list

esxcli vm process kill –t soft -w WorldID

esxcli vm process kill –type=[soft,hard,force] –world-id=WorldNumber

soft – Normal shut down .

hard – it will shut down the OS before properly closing applications.

force - it will force the VM to switch off just like pushing a power switch

6… Snapshot or Clone, which is better to keep for one month? Why?

Clone should be used. B’cos it will give good performance if we are going to use for long

time.

Snapshot should not be used for more than 3 or 4 days. It will affect the performance.

7…IF u deletes a snapshot what will happen

When you delete all snapshots for a VM, all of the delta files are merged back into the

original VMDK file.

If you delete an individual snapshot, that snapshot is merged into its parent snapshot.

if Snapshot Deletion fails or delta disk is not committed back to its parent disk

We have to use Snapshot Consolidation method.

To consolidate the snapshot files

Right-click the virtual machine  Snapshot  Consolidate.

Check the Need Consolidation column to check the task succeeded or not.

Right-click the menu bar of that vm column Needs Consolidation

A Yes status means vms should be consolidated.

A No status indicates that the files are OK.

8… If u creates a snapshot what will happen.

When you create a snapshot, the flat-vm.vmdk file becomes read-only.

And create a new “delta.vmdk” file in its name.

It starts writing into this delta file, and will not touch the original .vmdk file

(which represents a virtual machine’s hard drive)

Initial Snapshot File size is 16MB

Snapshot files: vm-number.vmdk , vm-number-delta.vmdk, vm.vmsd

9…How to keep 2 vms in a particular host.

Create Affinity Rules using DRS Groups Manager

(Check my “all others “Document)

10… Patching process, if there is a problem after patching what you will do.

Use Update Manager for Patching

Command for Patching

esxcli software vid install -d: This command will install a specified file

esxcli software vid install -d /vmfs/volumes/datastore/patches/file.zip.

esxcli software vid list: list of all patches & updates installed on the ESX/ESXi host

If there is a problem after patching what will you do.

Steps to Rollback if there is a problem

Reboot the Esxi server  press SHIFT+R to access recovery mode

Connect to the host using ILO, DRAC, RSA, etc.

Reboot the ESXi hosts

Press SHIFT+R to enter into recovery mode

It will prompt with a new screen with the Hypervisors installed. One would be the

default which is Update1

To confirm Roll back Press Y

Server will be rebooted and reverted to the previous version of ESXi 5

Command to remove the Patch

esxcli --server=server_name software vib remove --vibname=name

11… Command to check lun details, HBA card, Serial number,

esxcli storage core path list Lists all LUN paths currently connected to the ESXi host.

esxcli storage core device list gives a list of LUNs currently connected to the ESXi host.

12…Command to check vms process list & kill the process.

esxcli vm process list

esxcli vm process kill –t soft -w WorldID

13… How will you Enable SSH

Command to Enable : vim-cmd hostsvc/enable_ssh

Command to start : vim-cmd hostsvc/start_ssh

To Enable in GUI :

Click the Host  Configuration  Security Profile  Properties

14…What are the Esxi Sever Partitions

Bootpartition (4 MB): This partition is needed for booting

Bootbank (250 MB): Boot Image is saved on this FAT partition.
It will be extracted during the boot process and loaded into the system memory.

vSphere 4 this file size is 70 MB, vSphere 5 file size 250 MB.

AltBootbank (250 MB): This partition is empty after a fresh install. Once we update of

ESXi, the current image is copied from the bootbank partition to here.
This makes it possible to return to the last known good configuration by typing “Shift + R”

while booting if there occurs an error during the update of an ESXi host.

Dump/crash partition (110 MB): In the case of a total crash of the host a dump file is

written on this partition.

Store (285 MB): Different ISO files for the VMWare Tools are available for all

supported operating systems.

Scratch partition (4 GB): This partition is only created if the installation media has at

least 5 GB of space. It is used for the log files of the VMKernel.
If this partition is missing, the logs of the host are lost after a reboot or shutdown.

15…What is host isolation. How Host Isolation is detected? ESX hosts uses heartbeats to communicate with other hosts in the cluster.By default,

Heartbeat will be sent every 1 second.

If a ESX host didn't receive heartbeat for 13 seconds from any other hosts, The host will

consider it as isolated and host will ping the configured isolation address(default gateway

by default). If the ping fails, VMware HA will execute the Host isolation response

16…HA – AAM, FDM

Esxi 4.1 - AAM - Automated Availability Manager

Esxi 5.0 - FDM - Fault Domain Manager

AAM is the agent of HA in Esxi 4.1

FDM is the name of the agent in Esxi 5.0

The primary/secondary node mechanism in Esxi 4.1

Master Host , Slave Host concept in Esxi 5.0

The FDM Agent is responsible for communicating host resource information, Hosts

& vm status and HA properties to other hosts in the cluster heartbeat mechanisms,

vm placement, vm restarts,

log file is stored  /var/log/ fdm.log

FDM Master

---- The FDM Master monitors all hosts and VMs and slave hosts.

---- if host failure happens, the master restarts all VMs on another host.

---- It keeps a list of VMs protected, which is updated after every power off or on done by user.

---- keeps track of any adding/removing of hosts.

---- sends periodically status reports to vCenter

Slave

--- A slave monitors the vms it is running and informs the master about any changes.

--- The slave also monitors the health of the master by monitoring heartbeats.

--- If the master fails, the slaves initiate and participate in the election process.

Datastore Heartbeat - New concept in 5.0

--- If the primary network goes down this secondary network is used to find out

Whether the host is failed or isolated / partitioned host.
--- It Prevents Unnecessary Restarts due to isolation

17…What is the Pre-Requesties of HA, Vmotion

VMotion Pre-requisites

- Compatible Processors - Source and Destination hosts should have compatible

processors

- VMotion requires a Gigabit Ethernet network between hosts

- Shared Storage

- All virtual machines files should be accessible by source and target hosts

- Virtual machine swap files should be accessible to source and destination hosts

- Create vmkernal port and VMotion-enabled managed hosts.

- Port Number 8000 should be opened.

- Configure all managed hosts to use shared VMFS volumes

- Ensure the VMFS volume has space to store all virtual disks of virtual Machines

- Ensure all VMFS volumes on source and destination hosts use volume names, and all

virtual machines use those volume names for specifying the virtual disks.

HA prerequisites:

- Compatible Processors

- requires a Gigabit Ethernet network between hosts

- Shared Storage

- All hosts must be licensed for VMware HA.

- All virtual machines files should be accessible by source and target hosts

- Each ESX server in the cluster should have access to the virtual machines’ files and should be

able to power on the virtual machine without a problem

- You need at least two hosts in the cluster.

- All hosts need a unique host name.

- All hosts need to be configured with static IP addresses. If you are using DHCP, you

must ensure that the address for each host persists across reboots.

- All hosts must have access to the same management networks

18…How will you Trouble Shoot Vmotion Failure

If VMotion fails:

1. Check whether CPU is compatible

2. Check the ports 8000 is open or not

3. Enough resources must be made available on the target ESX/ESXi host

4. Verify that the required disk space is available.

5. Ensure VMKerenl Port configured , VMotion Option is enabled

6. Vmkping x.x.x.x Enter the hostname or IP address of the server that you want to ping

7. Verify that time is synchronized across environment

8. if reconnecting the ESXi host resolves the issue

9. Ensure CD-ROM is not mounted.
10. Storage - unresponsive/busy disk, network timeouts...

Which Logs to check for vmotion failures

check VMkernel logs on both source and destination host for clues to failure.

VMkernel logs - /var/log/vmkernel

check hostd logs on both source and destination host.

Hostd logs - /var/log/vmware/hostd*.log

19…How will you Trouble Shoot HA Failure

1. Check any network problem exists
2. Check the DNS is configured properly
3. Check HA agent status using command - service vmware-aam status
4. Check hosts named uniquely .

5. Check HA related ports are open in firewall to allow for the communication
Incoming port: TCP/UDP 8042-8045
Outgoing port: TCP/UDP 2050-2250 6. Try to restart /stop/start the HA agent on the affected host using the below

commands. try to restart vpxa and management agent in the Host.
service vmware-aam restart
service vmware-aam stop
service vmware-aam start

7. Right Click the affected host and click on "Reconfigure for VMWare HA" to re-install

the HA agent that particular host.

Goto cluster settings and uncheck the vmware HA to turnoff the HA in that cluster and

re-enable the vmware HA to get the agent installed

8. Remove the affected host from the cluster and add. To Remove the host -- put into

Maintenance mode.

20…Is it possible to Vmotion from one cluster to another cluster

Requirements:

1) ESX Servers must be managed by the same Virtual Center server

2) The VMs disk files must be stored on shared storage

3) Hosts Must have compatible CPUs

4) ESX Servers must be in same network segment configured with VMkernel ports enabled

for vmotion

5) Enable Jumbo Frames for Maximum Latency between the sites
6) The IP subnet of the virtual machine must be accessible for both source and destination

ESX servers

21… 5.0. 5.1 New Features

5.0

Storage Distributed Resource Scheduler (SDRS)

Profile-Driven Storage

Auto-Deploy

VMware vSphere Storage Appliance

VCenter Server Appliance

New virtual machine version version 8

5.1

ESXi/vSphere 5.1 License is per-CPU-socket based . Not vRAM based like 5.0

Support more recent hardware (both Intel and AMD). New "Version 9 virtual hardware"

It is possible to allow any VM generated on VMware ESX Server 3.5 or later to continue to

run on ESXi 5.1 unchanged (i.e., without being forced to shut down, update to the version 9

virtual hardware, and restart)

ESXi 5.1 comes with hardware accelerated 3D Graphics support.

vSphere Replication is now available independently from SRM. vSphere Replication allows

to mirror a VM to another datastore, it can be restarted there when the primary storage fails.

So far you could use vSphere Replication only together with the Site Recovery manager

(SRM) product,

Zero downtime VMware Tools Upgrade. Once the new VMware tools of vSphere 5.1

installed in a VM then you can later upgrade that to any newer version without rebooting a

VM.

Enhanced VMotion

Enhanced VMotion allows to migrate a VM from one host to another and to a different

storage at the same time without the need to power off the VM!

This enables you to live migrate a VM between different clusters (that usually do not share

any storage) or even between different stand alone hosts that each use local storage only.

22…Port Groups

vSwitches can be divided into smaller units called port groups

Port Groups are nothing but the VLANs or virtual local area networks

1. Virtual Machine Port Group - Used for Virtual Machine Network
2. Service Console Port Group - Used for Service Console Communications
3. VMKernel Port Group - Used for VMotion, iSCSI, NFS Communications

5.0

1. Virtual Machine Port Group - Used for Virtual Machine Network
2. VMKernel Port Group - Used for VMotion, iSCSI, NFS Communications

The management vmkernel port on ESXi 5.0 is same as Service Console port on ESX

23…Port Numbers

443 – Communication between vCenter Server to vSphere Client

902 -- VCenter Server to hosts. hosts send heartbeat over UDP port 902 to the vCenter

Server

HA Ports

Incoming port: TCP/UDP 8042-8045
Outgoing port: TCP/UDP 2050-2250

Vmotion Port – 8000

P2V Ports

443 and 902 - Source to ESX/VC

445 and 139 - Converter to source and source to Workstation/Server
9443 – web client

24…What are the files in a Virtual Machine ?
   .vmx - Virtual Machine Configuration File
     .nvram - Virtual Machine BIOS
    .vmdk - Virtual Machine Disk file
    .vswp - Virtual Machine Swap File
     .vmsd - Virtual MAchine Snapshot Database
     .vmsn - Virtual Machine Snapshot file
     .vmss - Virtual Machine Suspended State file
     .vmware.log - Current Log File
      .vmware-#.log - Old Log file

25….Difference between Standard vswitch , Distributed vSwitch

-- One Standard VSwitch per host. Cannot connect multiple hosts.

A Distributed Switch can connect multiple hosts.

-- Standard VSwitch Managed at host level.

A Distributed Switch managed at Cluster Level.

-- STP Spanning-Tree Protocol is not in vswitches. Its only in Distributed switch.

It prevents loops in the LAN and selects the fastest network Links.

If one network link goes down, Spanning Tree will use the alternate link.

-- A vSwitch does not perform IGMP Snooping. . Its only in Distributed switch

IGMP Snooping allows switches to read IGMP packets and forwarding network

packets based on their content.

-- DvSwitches also support distributed port groups or dvport groups.

26…Maximum Minimums

ESX 5.1 ESX 5 ESX 4.1

VCPUs per vm 64 32 8

CPUs per host 2048 2048 512

RAM per vm 1TB 1TB 255GB

RAM per host 2TB 2TB 1TB

Check for other details………I cant copy paste all…..

27…Esx Esxi Difference

ESXi Server has no service console

ESXi Server uses RCLI (Remote command line interface) instead of service

console utilities
ESXi Server is extremely thin = fast installation + faster boot
ESXi is so small that it can be easily installed and can even be booted from a

USB Flash disk
ESXi Server’s service console (firewall) is configured differently
ESXi Server has a “yellow firmware console”
ESXi Server has server health status built in
ESXi Server requires fewer patches and less rebooting

ESX server can be connected through direct-attached serial cable.

ESXi does not support interaction through direct-attached serial cable.

ESX supports Active Directory integration through third-party agents installed on the

Service Console.

ESXi allows users to login directly and authenticate in AD using a local username and

password.

28…Tell P2V steps

Take Backup of Physical Server

Note Down HostName , Ip Add, GW, DNS Ips.

C: D: Info…. Take a Screen Shot of it.

Stop the following services:

Start – Run – services.msc and click on Status until the Started services are listed first.

Backup services. Examples: TSM, NetBackup.

Database services. Examples: SQL, Oracle, MySQL, Exchange Serve.

Anti-Virus software. Examples: McAfee, Norton, Trend Micro.

Web Hosting services.Examples: World Wide Web Publishing service, IIS, Apache.

Print Spooler service.

Disable the following services:

All vendor-installed hardware management services.

All update services that are set to “Automatic” startup

Examples: Windows Update/Automatic Updates, Altiris, PatchLink Update.

Start the Following Services

Server and Workstation processes ,Volume Shadow Copy and Microsoft Software

Shadow Copy Provider are started.

Start P2V Process

RDP into the machine from which you will run VMware Converter Standalone Client 5.

Steps after Conversion

Remove any Serial Ports or USB Adapters from the hardware list if any are shown.

Check RAM size and the number of CPUs is correct.

In the “Network Adapter” section, “Connect at power on” check box not ticked.

Correct VLAN selected.

Now Power-On the Converted VM

Install VMware Tools

Software Removal

Remove all vendor-installed hardware management programs from “Add/Remove Programs”.

Remove the VMware Converter Agent software from “Add/Remove Programs”.

Remove any physical hardware drivers from “Add/Remove Programs” such as display drivers.

Do not reboot if prompted.

Hardware Removal

Go to a CMD prompt and type:

SET DEVMGR_SHOW_NONPRESENT_DEVICES=1

and then

DEVMGMT.MSC to open Device Manager

and then select “Show Hidden Devices” from the Device Manager “Action” or “View” menu.

RDP into the source machine Disable the NIC card

virtual machine Edit Settings  network cardclick the “Connect” then the “Connect At Startup”

Power on The VM and Check the services and start the services.

29…Esxi 4.1 & Esxi 5.0 License Difference

4.1 Based on CPU Core

5.0 Based on RAM

Based on CPU Core

30…Why cant upgrade from 3.5, 4.0 to 5.0

5.0 Uses 64 bit Hardware and OS

So upgrade to 4.1 then to 5.0

3.5, 4.0 Boot Partition is 1 GB.. 5.0 is 4 MB

Important Commands will be asked

To check the Hardware details : esxcli hardware platform get

UUID: 0x74 0xd3 0x36 0x4 0x3c 0xe7 0x11 0xdf 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x11

Product Name: N20-B6625-1

Vendor Name: Cisco Systems Inc

Serial Number: FCH1432V1HY

IPMI Supported: true

Show ESXi version and build : esxcli system version get

To Find hostname. : # esxcli system hostname get

To Poweroff, Reboot a host, it must be in maintenance mode

Power off a host : # esxcli system shutdown poweroff --delay=10 --reason=”Hardware

maintenance”

( Delay and Reason parameter must be provided. )

Reboot the host : esxcli system shutdown reboot -d 10 –r “Patches applied”

Enter Maintenance Mode : esxcli system maintenanceMode set –enable yes

Exit maintenance Mode : esxcli system maintenanceMode set --enable no

esxcli storage core path list Lists all LUN paths currently connected to the ESXi host.

esxcli storage core device list List of LUNs currently connected to the ESXi host.

esxcli storage filesystem list : List of all datastores mounted to an ESXi host

esxcli storage core adapter list -- To find HBA WWN on ESXi 5.0

Configuration tab Hardware  Storage Adapters:

To list the available port groups : esxcli network vswitch standard portgroup list

list current vswitch configuration : esxcli network vswitch standard list

list NIC cards and their link state : esxcli network nic list

list Distributed Switch configuration : esxcli network vswitch dvs vmware list

list vmkernel interfaces and configuration : esxcli network ip interface list

How will you remove a LUN from a host

ESX/ESXi 4.1

The best practices for removing a LUN from an ESX 4.1 host

Unregister all objects from the datastore including VMs and Templates

Ensure that no 3rd party tools are accessing the datastore

Ensure that no vSphere features, such as Storage I/O Control, are using the device

Mask the LUN from the ESX host by creating new rules in the PSA (Pluggable Storage Architecture)

Physically unpresent the LUN from the ESX host using the appropriate array tools

Rescan the SAN

Clean up the rules created earlier to mask the LUN

Unclaim any paths left over after the LUN has been removed

Esxi 5.0

1. Unregister all objects from the datastore including VMs and Templates

2. Ensure that no 3rd party tools are accessing the datastore

3. Ensure that no vSphere features, such as Storage I/O Control or Storage DRS, are using the

device

4. Detach the device from the ESX host; this will also initiate an unmount operation

 Choose the Devices View (Under Configuration > Storage):

To Patch an ESXi 5.0 host from the command line:

“ Install “ command overwrites the existing packages. It may downgrade the existing packages,

Overwrite existing drivers.

“ Update” command is the recommended. It will update from lower version to new.

Patching Steps

Patches can be downloaded from the VMware patch portal. Select ESXi (Embedded and Installable) in the product dropdown and click Search.
Upload the patch to a datastore using the Datastore Browser from vCenter or a direct connection to the ESXi 5.0 host using the vSphere client.
Log into the local Tech Support Mode console of the ESXi 5.0 host.
Migrate or power off the virtual machines and put the host into maintenance mode.
# vim-cmd hostsvc/maintenance_mode_enter
Navigate to the directory on the datastore where the patch file was uploaded
# cd /vmfs/volumes/Datastore/DirectoryName
# ls

Where Datastore is the datastore name where the patch file was uploaded to, and DirectoryName is the directory you created on the datastore.
- Install or update a patch on the host using these esxcli commands:
- To Install: Using local setup:# esxcli software vib install -d "/vmfs/volumes/Datastore/DirectoryName/PatchName.zip"
- esxcli software vib install -d /vmfs/volumes/[DATASTORE]/[PATCH_FILE].zip
  
  Where PatchName.zip is the name of the patch file you uploaded to the datastore.
  # esxcli software vib install -d "/vmfs/volumes/datastore1/patch-directory/ESXi500-201111001.zip"
- Using http setup:
  # esxcli software vib install -v viburl
  Where viburl is the URL to the http depot where VIB packages reside.
  
  # esxcli software vib install -v https://hostupdate.vmware.com/software/VUM/PRODUCTION/main/esx/vmw/vib20/tools-light/VMware_locker_tools-light_5.0.0-0.7.515841.vib

To Update: Using local setup:# esxcli software vib update -d "/vmfs/volumes/Datastore/DirectoryName/PatchName.zip"
Where PatchName.zip is the name of the patch file you uploaded to the datastore.

# esxcli software vib update -d "/vmfs/volumes/datastore1/patch-directory/ESXi500-201111001.zip"

Using http setup:
# esxcli software vib update -v viburl
Where viburl is the URL to the http depot where VIB packages reside.
# esxcli software vib update -v https://hostupdate.vmware.com/software/VUM/PRODUCTION/main/esx/vmw/vib20/tools-light/VMware_locker_tools-light_5.0.0-0.7.515841.vib

Verify that the VIBs are installed on your ESXi host:# esxcli software vib list

Name              Version                     Vendor Acceptance Level Install Date
----------------- --------------------------- ------ ----------------------------------------------------
ata-pata-amd      0.3.10-3vmw.500.0.0.469512 VMware VMwareCertified 2012-05-04
ata-pata-atiixp   0.4.6-3vmw.500.0.0.469512   VMware VMwareCertified 2012-05-
After the patch has been installed, reboot the ESX host:
# reboot
After the host has finished booting, exit maintenance mode and power on the vms .
# vim-cmd hostsvc/maintenance_mode_exit

Install vmtools

Install VMware Tools:

1. Download and install the keys:

Create a file vmware-tools.repo under path /etc/yum.repos.d/with the below content –

Install the VMware Tools with below command

To perform a silent, non-GUI with suppressed reboot VMware Tools installation in a Windows guest operating system:

In ESXi 5.0.x and earlier versions, run this command:

setup.exe /S /v"/qn REBOOT=ReallySuppress

In ESXi 5.1.x, run this command:

setup.exe /S /v"/qn REBOOT=R"

To collect diagnostic information using the script on a Linux host

Confirm what version of VMware Server you are running, type:vmware -v
Change to the directory where you want the vm-support output to appear. For example:cd /tmp
Run the script:/usr/bin/vm-support
When the script finishes, it informs you of the output .TGZ filename and location

esxcfg-dumppart

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1006796

[root@az84vm4 /]# esxcfg-dumppart

esxcfg-dumppart <options> [<partition>]

-l|--list List the partitions available for Dump Partitions.

WARNING: This will scan all LUNs on the system.

-t|--get-active Get the active Dump Partition for this system,

returns the device identifier for the partition

(naa.xxxxx:1) or 'none'.

-c|--get-config Get the configured Dump Partition for this

system, returns the device identifier for the partition

(naa.xxxxx:1) or 'none'.

-s|--set Set the Dump Partition for this system and activate it,

either naa.xxxxx:1 or 'none' to deactivate

the active dump partition.

-f|--find Find usable Dump partitions and list in order of

preference.

-C|--copy Copy a dump file from the dump partition:

-D --devname /vmfs/devices/disks/<partition name>

-z --zdumpname outputName (optional)

-n --newonly (optional)

-o --slot slotnum (optional)

-U --unqualified-dev (FOR INTERNAL USE ONLY)

-L|--log Extract the log from a compressed dump.

-S|--smart-activate Activate the configured dump partition or find

the first appropriate partition and use it

(same order as -f).

-a|--activate Activate the configured dump partition.

-d|--deactivate Deactivate the active dump partition.

-h|--help Show this message.

Techie

Saturday, 6 October 2018

os repair

Troubleshooting

Restart your PC regularly

Run a hardware diagnostic test

Update BIOS and device drivers

Optimize your PC with Dell SupportAssist

Scan your PC for corrupt Windows files

Uninstall or remove unused software

Check for symptoms in Safe Mode

Limit startup programs

Scan your PC for malware

Restore your Dell PC using Windows System Restore

Reinstall Microsoft Windows

Blue screen of death in windows

Monday, 16 April 2018

job roles

Saturday, 14 April 2018

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