To create a remote interactive shell as the current user, which command should you use?

The correct choice for creating a remote interactive shell as the current user is to simply use the command "ssh remotehost." This command allows you to connect to a remote machine using SSH (Secure Shell) while defaulting to the currently logged-in user on your local machine. If you are currently logged in as user "bob" on your local machine and you execute "ssh remotehost," you will be logged into the remote machine as "bob," assuming the user exists on that machine and has SSH access.

Choosing a different command, such as "ssh remoteuser@remotehost," specifies a different username for the remote system explicitly. While this can be useful if you want to log in as a different user, it does not fulfill the requirement of connecting as the current user.

The option "ssh remoteuser@remotehost hostname" is unnecessary because appending "hostname" would not create an interactive shell as desired. Instead, this syntax may lead to confusion and is incorrect for establishing a straightforward SSH connection.

Therefore, simply using "ssh remotehost" is the correct and most efficient method for establishing a remote interactive shell session with the same username you are using locally.