O'Reilly logo

Korn Shell: Unix and Linux Programming Manual, Third Edition, The by Anatole Olczak

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Built-in Commands

The following simple-commands are executed in the shell process. Input/Output redirection is permitted. Unless otherwise indicated, the output is written on file descriptor 1 and the exit status, when there is no syntax error, is zero. Except for :, true, false, echo, command, newgrp, and login, all built-in commands accept to indicate end of options. They also interpret the option -? as a help request and print a usage message on standard error. Commands that are preceded by one or two § symbols are special built-in commands and are treated specially in the following ways:

  1. Variable assignment lists preceding the command remain in effect when the command completes.

  2. I/O redirections are processed after variable assignments. ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required