Some features to make life easier
This section contains some ways of working with the shell. You can
do any of the following:
Use environment variables or aliases to make your Korn or Bourne
shell prompt tell you what your current directory is, or to display
other useful information.
Use the Bourne or Korn shell trap command to specify
actions to take when the shell receives a signal; for example, to
execute a logout script.
Use the Korn shell or C shell to recall and edit previously issued
Define complex aliases or functions to shorten long command lines or
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UnixWare 7 Release 7.1.4 - 22 April 2004