how to change group gid in a linux

1. login to user account and run id command you will get users current uid, gid information of the account, suppose oracle gid was 1004 and you want to change it to 1040 2. login to root and run the following command to change the gid groupmod -g 1040 oracle 3. now login to the user account and run the id command again. you will see new gid of the user group