Linux in a Nutshell, Fifth Edition

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Chapter 6: The Bash Shell and Korn Shell

This is the Title of the Book, eMatter Edition

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-P Like -p, but force a PATH search, even if type -t would not

print file.

-t Print a word describing each command. The word is one of

alias, builtin, file, function,orkeyword, depending upon the

type of each command.

Example

$ type mv read if

mv is /bin/mv

read is a shell builtin

if is a shell keyword

type

type commands

Korn shell alias for whence -v.

typeset

typeset [options] [variable[=value ...]]

typeset -p

In Bash, identical to declare. See declare.

In the Korn shell, assign a type to each variable (along with an

optional initial value), or, if no variables are supplied, display all

variables of a particular type (as determined by the options). When

variables are specified, -option enables the type, and +option

disables it. With no variables, -option prints variable names and

values; +option prints only the names.

The second form shown is specific to ksh93.

Options

-A arr

arr is an associative array. ksh93 only.

-b The variable can hold any data, including binary data. Refer-

ences retrieve the value printed in base-64 notation; The %B

format with printf may be used to print the value. ksh93 only.

-E d

variable is a floating-point number. d is the number of decimal

places. The value is printed using printf %g format. ksh93

only.

-f[c]

The named variable ...