0.5. Chapter Summary
If you want to investigate specific topics rather than
read the entire book through, here is a chapter-by-chapter
summary:
- Chapter 1
-
Introduces the Korn shell and tells you how to install it
as your login shell. It then
introduces the basics of interactive shell
use, including overviews of the Unix file and directory scheme,
standard I/O, and background jobs.
- Chapter 2
-
Discusses the shell's command history mechanism, including
the emacs and vi editing modes and the hist history command.
- Chapter 3
-
Covers ways to customize your shell environment without
programming, by using the .profile and environment files.
Aliases, options,
and shell variables are the customization
techniques discussed.
- Chapter 4
-
Introduces shell programming. This chapter explains the
basics of shell scripts and functions, and discusses
several important "nuts-and-bolts" programming features:
string manipulation operators, regular expressions,
command-line arguments (positional parameters), and command
substitution.
- Chapter 5
-
Continues the discussion of shell programming by describing
command exit status, conditional expressions, and
the shell's flow-control structures: if, for,
case, select, while,
and until.
- Chapter 6
-
Goes into depth about positional parameters and command-line
option processing, then discusses special types and properties
of variables, such as integer and floating-point arithmetic,
the arithmetic version of the for loop,
indexed and associative arrays, and the
typeset command.
- Chapter 7
-
Gives a detailed description of Korn shell I/O, filling in
the information omitted in Chapter 1. All of the shell's I/O
redirectors are covered,
along with
the shell's ability to make
TCP/IP socket connections
and the line-at-a-time I/O
commands read, print,
and printf. The chapter then
discusses the shell's command-line processing mechanism
and the eval command.
- Chapter 8
-
Covers process-related issues in detail. It starts with a discussion
of job control and then gets into various low-level information
about processes, including process IDs, signals, and traps.
The chapter then moves out to a higher level of abstraction to
discuss coroutines, two-way pipes, and subshells.
- Chapter 9
-
Discusses various debugging techniques, starting with
simple ones like trace and verbose modes and "fake signal"
traps.
Next, this chapter describes discipline functions.
Finally, it presents kshdb, a Korn shell debugging
tool that you can use to debug your own code.
- Chapter 10
-
Gives information for system administrators, including
techniques for implementing system-wide
shell customization,
customizing the built-in editors,
and features related to system security.
- Appendix A
-
Compares the 1993 Korn shell to several similar shells,
including the standard SVR4 Bourne shell,
the 1988 Korn shell,
the IEEE 1003.2 POSIX shell standard,
the CDE Desk Top Korn shell (dtksh),
tksh (which blends Tcl/Tk with ksh),
the public domain Korn shell (pdksh),
the Free Software Foundation's bash,
the Z shell (zsh),
and a number of Bourne-style shells (really Unix-emulation environments)
for Microsoft Windows.
- Appendix B
-
Contains lists of shell invocation options, built-in commands,
predefined aliases,
built-in variables, conditional test operators, set command options,
typeset command options, and emacs and vi editing mode commands.
This appendix also covers the full details for using the getopts built-in command.
- Appendix C
-
Describes how to download the source for ksh93
and build a working executable.
This appendix also covers downloading prebuilt executables for a number of different systems.
- Appendix D
-
Presents the licensing terms for the ksh93
source code.
| | | 0.4. Code Examples | | 0.6. Conventions Used in This Handbook |
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