In some cases you need to perform only a simple operation on your drawing, for which you don't need the graphical display - e.g. for purge operations, saving to another format, switching layers, inserting a block, updating thumbnails, etc. Also many software developer workflows can be completed without graphical interface.
Since AutoCAD 2013 you can run this program also in a fast, simplified version, without the graphical window. But most commands remain functional, you can load applications and drawings, perform non-graphical editing operations. The mail advantage is fast loading and working even on a computer without an appropriate CAD graphics card. This mode is very suitable for running scripts and automatic operations.
You can run the core console version of AutoCAD or AutoCAD LT by the EXE program AcCoreConsole.exe located in the AutoCAD folder:
You can enter AutoCAD commands interactively or specify the particular drawing and script in the runstring. The runstring parameters for running the console are these:
AcCoreConsole.exe [/i {input dwg}] /s {script} [/product {product}] [/l {language}] [/isolate {userid} {userDataFolder}] [/readonly] [/p[rofile] {profile}] [/loadmodule {module}]
AutoCAD commands not supported in the console version are listed in the overview.
See also the tip Complete Purge on a single click.