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Connect to Oracle Linux O/S without password !!

DISCLAIMER : Do not attempt this on critical or Production System.

I run multiple VirtualBox hosting Oracle Linux with Oracle database. It’s like a playground for me to do lot of oracle stuff.

Every time I have to take a connection , It’s painful to enter id/pwd for these so called playground system.

Started doing a little search as to how other fellow DBAs are getting away with this issue. Here is a little cheat trick that can be applied on non-critical systems.

Putty doesn’t give you an option to store password, but it does give you an option to store user name. Refer to below screenshot.

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Assuming user ‘neeraj’ was already created in Oracle Linux O/S , let take a connection by specifying password

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Let’s create a dir .ssh into /home/neeraj

Next challenge is how to avoid entering password everytime a connection is established to OL ( Oracle Linux ) via account ‘neeraj’

Here is a little cheat trick

Download Putty Keygen software from this url andopen the same. Keep settings as show below.

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Click on generate button and randomly move mouse on blank area to generate a random key. Within a min, you would see similar to this

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Click “Save Private Key button” and save Private key on local drive.

Note : If anyone get hold of this Private key, they can access your Virtual Machine running within VirtualBox without the need to enter id/pwd.

Next step is to open saved Private key ( C:\Misc_Things\test.ppk ) in notepad and copy the lines that represent PUBLIC key in clipboard

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Since there are 3 lines , make sure to combine all line and create sort of single line which represents Public Key.

Since your putty session via ‘neeraj’ account is still active , go into following dir /home/neeraj/.ssh/

and create a file called authorized_keys and paste that 1 line which represents public key

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Notice we have to insert ” ssh-rsa ” in front of our public key. There is a space in front and end of keyword ssh-rsa. Click on above screenshot to see a large image file

Now configure existing putty connection to use Private Key as shown below

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Now take a fresh connection …. Voilla as seen in below screenshot , we dint had to enter pwd , it utilized Private/Public key and authenticated our dummy account ‘neeraj’

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How to find Virtual Box Guest Addition version in Oracle Linux

Hi,

Recently I broke VirtualBox Guest Addition within my OracleLinux box and was not sure what version am I really running.

Here goes a simple command to check version

[root@pr ~]# modinfo vboxguest

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