Extend Data Volume on a Windows Virtual Machine using VMware vCentre convertor

Already there is a method to do this task by extending the provisioned space but there we need to shutdown the server to add the hard disk,

This method doesn't need to shutdown the server to extend the virtual Drive.

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Extend Data Volume on a Windows Virtual Machine (VMware ESXi)

I had an issue recently with my disk space, I was running out of space so I need to add more space to the virtual Disk, 

But i was thinking if i add another new virtual disk and meagre that with the existing one i may need to shut down the server once. 

But luckily i had fee provisioned space so, I just increased the virtual disk space and then followed the steps given below,

Its worked well, but I couldn’t add the space without shutting down the server in this method.  

1.	Add Additional Space to the Virtual Hard Drive - Once connected, select your Virtual Machine from the Hosts & Clusters or VMs & Templates view. - Click "Edit Settings" - Select your Virtual Disk, and increase the Provisioned Space. - Click OK - Using the vSphere Client, connect to vCenter server or your host.
2.	Extend the Volume - Open a Command Prompt - Use the following commands from the Microsoft KB 325590 DISKPART>list volume (You'll see the volumes - note the vol number you want to expand) (Or whatever volume number you're expanding) (will extend to full amount of space available) - Access your Server (either Open Console from the vSphere Client or RDP)  c:\diskpart.exe  DISKPART>select volume 1  DISKPART>extend  DISKPART>exit

Set up an FTP server on Amazon AWS EC2

You really don't need to set up an FTP server if you simply want to tranfer files between your EC2 instance and your local machine. You can use PSFTP (coming with putty package) with a saved putty session for your EC2 conection. Open a command window, type in psftp your_saved_putty_session_name. Type ec2-user for  login as and you are connected.

If you don't like commandline tool, you can use Filezilla instead. Download and install Filezilla client.  Lauch Filezilla. Click Edit -> Settings and select SFTP under Connction. Click Add Keyfile to add the private key file you use for putty connection. Click OK.

Click File -> Site Manager, Click New Site, enter your AWS EC2's public DNS or IP in Host field. Choose SFTP, enter ec2-user in User field and click Connect.

Now you are connected to your EC2 instance with FileZilla.

If you still want to set up an FTP server on your AWS EC2. Below are steps to install VSFTP.

1. login to  your AWS management console.
   • Go to EC2 and click the Security Groups link.
   • Then choose the default group and switch to the inbound tab (at the bottom of the page)
   • Add the port ranges as above (20-21 and 40000-41000) and apply the rule changes
2. connect to your instance with putty.
3. login as ec2-user
4. sudo su
5. yum vsftpd
6. change the conf file. vim /etc/vsftpd/vsftpd.conf. Add

   write_enable=YES 
   
   pasv_max_port=41000
   pasv_min_port=40000
   port_enable=YES
   pasv_enable=YES
   
   

7. 
   Add an FTP user (see instruction here)
   
   

8. 
   Start the FTP server. service vsftpd start
   
   
   
   

How to enable direct ssh to EC2 linux instance without keypair file

how to enable direct ssh to EC2 linux instance without keypair file

To enable the direct ssh to linux EC2 instance without using keypair file we have to edit the sshd_config file.

Follow the given below steps

Step 1 : Login into linux EC2 instance with the help of keypair. Use the user name which is related to your instance. for eg.

example:

ssh -i keypar_file.pem ubuntu@ec2-1.1.1.1.compute-1.amazonaws.com

Step 2: After login ,edit the /etc/ssh/sshd_config file and make the value of parameter called PasswordAuthentication as yes

vi /etc/ssh/sshd_config

change the PasswordAuthentication value as yes

PasswordAuthentication yes

:wq
save and exit

Step 3: Restart the ssh service.

In Debian or Ubuntu instance:

/etc/init.d/ssh restart

In CentOS or Red Hat instance:

/etc/init.d/sshd restart

Step 4: Open new terminal in your PC or laptop. ( Do not take the risk  ,playing safe side )

Now try direct ssh without using keypair file.

for eg.

ssh ubuntu@ec2-1.1.1.1.compute-1.amazonaws.com

DNS Pointing

A (Host) records

A records (also known as host records or address records) point a domain name or subdomain to an IP address. For example, if you want your domain "domainnamegoeshere.com" to point to your home computer (whose IP address is, for example, 172.0.0.1), the A record would list "domainnamegoeshere.com", or "@" as the host and "172.0.0.1" as the "Points To" IP address. Entering "@" for the host name is the same as entering your domain name, minus the "www". Entering "www" for the host name is the same as entering your domain name, including the "www

CNAME records

CNAME records (also known as alias records) point a subdomain to an existing A (host) record so that the domain points to the appropriate IP address.

Entering "@" for the host name is the same as entering your domain name, including the "www".

The Points To Host Name should be defined as your domain name (i.e., "www.domainnamegoeshere.com") or "@" (Entering "@" will automatically insert your domain name as the host name for the CNAME Record). The Alias field should be the subdomain of your top-level domain the CNAME record points to your domain.

For example: If you want the CNAME record to point "www" within your domain to "www.domainnamegoeshere," you should enter "www" in the Alias field and "www.domainnamegoeshere.com" in the Points To field. If you want the CNAME record to point "email" within your domain to "email.domainnamegoeshere," enter "email" as the Alias and "email.domainnamegoeshere.com" as the Points To Host Name.

MX records

MX records are for routing email that is addressed to a particular domain name. Like a CNAME record, an MX record points one domain name or subdomain to another domain name or subdomain for which an A record exists.

Entering "@" for the host name is the same as entering your domain name, minus the "www." Entering "www" for the host name is the same as entering your domain name, including the "www".

NS records

NS records specify the authoritative nameservers (both primary and secondary) for the given domain. The authoritative nameservers are identified by name, not IP address. For this reason, an A record must exist for the specified nameservers. Without it, connecting to the servers might be impossible. In every DNS zone, there must be at least two NS records.

TIPS For SYSADMIN

TIPS For SYSADMIN

Open a New RDP session, 

mstsc /v:00.00.00.00 /admin

Replace 00.00.00.00 with your server's IP Address.

Server Mail Queue check

You can also run this on intdelivery.internal

sudo tail -f /var/log/mail.log | grep ServerName

It will monitor the last lines of the mail log and check for ServerName so you can see if mail is being delivered or failing

User details checking in AD

C:\Users\ssatchi>net user username /domain

Check machine is physical or virtual

Open command prompt and run the following command

systeminfo

This command will give you the full details of your system , scroll down to see the following information

system Manufacturer line,

If the system is a physical machine then you ll see

system Manufacturer  ASUS,DELL,HP

If the system is a virtual machine then you will see

system Manufacturer : VMware inc.

System Model : VMware virtual Platform.

If the system is a microsoft Hyper-V then you will see

system Manufacturer : Microsoft Corporation.

System Model : Virtual Machine

How many users are logged on/connected to a server?

On the Server

NET SESSION | FIND /C "\\"

On Remote Server

PSEXEC \\servername NET SESSION | FIND /C "\\"

When did someone last change his password?

H:\>net user saththiyan /domain | find /I "password last set"

Password last set            8/11/2013 5:32:27 PM

Is some one’s account locked ?

H:\>net user saththiyan /domain | find /I "account active"

Account active               Yes

Unlock the account

License capacity monitoring alarm triggered in vCenter Server

License capacity monitoring alarm triggered in vCenter Server

Symptoms

·    License capacity monitoring alarms are triggered in vCenter Server.

·    After upgrading to vCenter Server 5.x, license capacity monitoring alarms trigger.

·    This issue occurs even when license key counts in the Management tab are under capacity.

Note: To access the Management tab, Click Home > Administration > Licensing. Click the Management tab and select the License key radio button.

Cause

This issue occurs because vCenter Server reports that vRAM licensing capacity is exceeded.

Resolution

This is a known issue affecting vCenter Server 5.x.

VMware has eliminated the vRAM restriction on licenses to VMware vSphere. For more information, see the Updated vRAM Policy. This alarm can be safely ignored or disabled.

To disable the alarm:

1. Log in to vCenter Server.

2. Select the vCenter Server at the top level (above Datacenter and Cluster).

3. Select Alarm Definition.

4. Locate the License capacity monitoring alarm.

5. Right-click the alarm and click Edit Settings.

6. In General tab, deselect the Enable this alarm option.

Ref : http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2052463