How to clear/delete the cached Kerberos ticket ?

In Linux



In Windows

klist purge

How to check the Java architecture from command line ?

To check the Java architecture whether it is 32 bit or 64 bit, the following commands will be helpful.

Execute the following commands in the command line and check the results

java -d32 -version

java -d64 -version

If any of the above command is giving an error message similar to “Error: This Java instance does not support a xx-bit JVM.” If it is not supporting 32 bit, then we can say it is a 64 bit Java. If it is not supporting 64 bit, we can say it is a 32-bit Java. The screenshot of the same is attached below.


Hope this will help .. 🙂

Programmatic way to reboot EC2 instances

Sometimes we might have to reboot EC2 instances. If the requirement is to restart EC2 instances regularly, we can achieve it by writing a small piece of code. I also came across a similar requirement and a portion of the code I used is given below.


How to Press Cntrl+Alt+Del in Remote Desktop

This is very simple. But most of us doesn’t know this.

Just press  Cntrl+Alt+End, this will do Cntl+Alt+Del in the remotely taken desktop

Normal Cntrl+Alt+Del will work in the host machine.