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Shell

From EDM2
Revision as of 22:48, 28 October 2017 by Ak120 (talk | contribs)

In computing, a shell is a user interface for access to an operating system's services. In general, operating system shells use either a command-line interface (CLI) or graphical user interface (GUI), depending on a computer's role and particular operation. It is named a shell because it is a layer around the operating system kernel.

OS/2 CONFIG.SYS statements

  • PROTSHELL - CONFIG.SYS command to define protected mode shell
Example: PROTSHELL=C:\OS2\PMSHELL.EXE
  • SHELL - CONFIG.SYS command to define DOS command interpreter
Example: SHELL=C:\OS2\MDOS\COMMAND.COM C:\OS2\MDOS /P
  • OS2_SHELL - Environment variable
Example: SET OS2_SHELL=C:\OS2\CMD.EXE