This file is /cdf/run1/documents/development/cdfsga_command_line_editor.note


Since May 23rd 1994, new users are started with "tcsh" as their 
default shell on cdfsga.

This shell allows for command line recall and editing much like
on the VAX.   For an example, the up arrow recalls the
previous command.

More information on tcsh can be obtained with the command:
    > man tcsh



If you do not like this shell, you can specify a different shell 
as your default using a command similar to:
    > cmd shell /bin/csh
It will take effect the next time you log in.

You only need invoke "cmd" once ever, it updates the
password file.  "cmd" should not be placed into 
the .login file.



If you have got a different shell, and you want to use "tcsh"
as the default, the command
    % cmd shell /usr/local/bin/tcsh
can be used to change the default.  It will take effect
the next time you log in.



In some unusual circumstances of setups and keyboards, you may also 
need to issue this set of commands 
    > stty erase "^?"
    > stty intr "^C"
    > stty kill "^X"
to get the Backspace key to work as one expects.



An experimental command line correction algorithm is
available in tcsh.  It is enabled via:
    > set correct=all
Afterwards, all words on the command line are checked.  If any part of 
the command line is corrected, the user will be given a special prompt, 
followed by the corrected line, e.g.

    > lz /usr/bin
    CORRECT>ls /usr/bin (y|n|e|a)?



Note: Neither the Korn shell (ksh) nor the Bourne again shell (bash) 
are supported in CDF.  While they are available, it should be 
recognized that 100% of the users use tcsh.