Add the User to sudo group

to add the user "lalatendu" to the sudo group in Ubuntu, you can follow these steps:

Open a terminal window on your Ubuntu system.
Use the usermod command to add the user to the sudo group. Type the following command:

sudo usermod -aG sudo lalatendu

This command will add the user "lalatendu" to the "sudo" group, which grants the user administrative privileges on the system.
You can confirm that the user has been added to the sudo group by running the following command:

groups lalatendu

This command will show the groups that the user "lalatendu" belongs to, including the "sudo" group.