Emacs: Download
Windows
This is the official GNU Emacs, build for Windows by Free Software Foundation. Download at
http://ftp.gnu.org/pub/gnu/emacs/windows/
After download, right click on the zip file, select “extract all” to unzip it.
Then open the extracted folder, open the folder named “bin”, click the “runemacs” to start emacs.
Uninstall
To uninstall, just delete the folder.
Mac
Download plain GNU Emacs, built by David Caldwell. At http://emacsformacosx.com/
Linux
Build Emacs from Source Code
Download Emacs Binary from apt-get
On Ubuntu, to check available emacs package version for install,
# search for emacs binary apt-cache search emacs | grep emacs
Typically you install by
sudo apt-get install emacs27
, where the emacs27 may be other version.