Smalltalk (3.2.5) on Ubuntu (20.04)

If just you want to tinker with Smalltalk, enter gst at the command prompt
and have at it. Smalltalk, albeit stripped down, is included with 20.04.

If you want to go beyond tinkering . . .

1.  Install the instruction manual:
      1.1 Enter 'sudo apt-get install gnu-smalltalk-doc' . Enter 'info gst'
to read it.

2.  Install the Emacs tools for debugging/editing:
      2.1 Enter 'sudo apt-get install gnu-smalltalk-el' to get the Emacs
support files.
      2.2 Enter 'sudo apt-get install emacs' to install Emacs'.
      2.3 Within Emacs enter 'M-x package-install <CR> smalltalk-mode' to
get the Smalltalk support files. Many thanks to Steve and Derek for helping
me get this working.

3.  Learn about the Smalltalk packages:
      3.1  Enter 'sudo apt-get cache search gnu-smalltalk' .

Gary Highberger writes:
2.1 and 2.3 are redundant. You are basically installing an older version
of smalltake-mode system wide, then a newer version of smalltalk-mode in
your current user's environment to override.

Derek