Multiple Emacs Shell Buffers

Michael Tsai - Blog - Multiple Emacs Shell Buffers
it is useful when you need it, especially remote login with a telnet session.
You need to open the new shell by
> M-x eshell
When you want to open a new shell session, use
> M-x rename-buffer
to rename the current buffer name from *eshell* to something else, then after you enter the
> M-x eshell
you get a new buffer!