Maths secrets :

• Reverse of squares of 12 and 13 is equal to the squares of 21 and 31 respectively .

             12 x 12  = 144 | 441 = 21 x 21
             13 x 13  = 169 | 961 = 31 x 31

• After 7 all prime numbers end with 1,3,7 or 9 . 

             For eg - 11 , 13 , 17 , 19 , 23 , 29 , 31 , 37 etc

• All squares of numbers are multiples of 4 or multiples of 4 +1 

            For eg - 9 =  4 x 2 + 1
                 16 =  4 x 4
                 25 =  4 x 6 + 1
                 36 =  4 x 9

Decrypting Weblogic Password

If you forget your weblogic password , you can recover it as it is stored in boot.properties file in encrypted format .

NOTE : You have to make boot.properties file in AdminServer/security folder first, it is not automatically present .

Step 1 : 

  Create a script decrypt.py in $DOMAIN_HOME/security directory and paste the following code into it:

from weblogic.security.internal import *

from weblogic.security.internal.encryption import *

#This will prompt you to make sure you have SerializedSystemIni.dat file under #current directory from where you are running command

raw_input("Please make sure you have SerializedSystemIni.dat inside the current directory, if yes press ENTER to continue.")

# Encryption service

encryptionService = SerializedSystemIni.getEncryptionService(".")

clearOrEncryptService = ClearOrEncryptedService(encryptionService)

# Take encrypt password from user

pwd = raw_input("Please enter encrypted password (Eg. {3DES}Bxt5E3...): ")

# Delete unnecessary escape characters

preppwd = pwd.replace("\\", "")

# Decrypt password

print "Your password is: " + clearOrEncryptService.decrypt(preppwd)

-------------------------------------------------------------------------------------------------------------------------

Step 2 :

 

Go to $WL_HOME/server/bin folder

Run the below command to set environment

. ./setWLSEnv.sh ( make sure you have two dots separated by a space)

Step 3:

Goto $DOMAIN_HOME/servers/AdminServer/security/boot.properties file and copy the encrypted username 

Step 4 :

Run the script in $DOMAIN_HOME/security folder as 

java weblogic.WLST decrypt.py 

and enter the encrypted password when prompted and then press enter .

You will get the original password !!

How to run Weblogic's Admin / Managed / Nodemanager in background :

• Open terminal
• Navigate to $DOMAIN_HOME/servers/AdminServer
• Create a new directory named security .
• Go to security and create a file boot.properties
• Enter the username and password in it 
• eg -
• username=weblogic
• password=Welcome_1
• ~
• ~
• NOTE : do not leave extra spaces ; the next line after password should have "~" sign .
• Save this file and copy this file to managed server also . 
• Then go to $DOMAIN_HOME/bin and run AdminServer as
• nohup ./startWeblogic.sh &
• Press enter to come out of it 
• Then run tail command as
• tail -f nohup.out
• Now the server has been started in background 
• You can close the terminal without affecting the severs . 

CHEERS !!