Linux in a Nutshell, Fifth Edition

fc | 665

Bash and Korn

This is the Title of the Book, eMatter Edition

Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.

Options

-f Names refer to functions; the functions are exported in the

environment. Bash only.

-n Remove the named variables or functions from the environ-

ment. Bash only.

-p Print export before printing the names and values of exported

variables. This allows saving a list of exported variables for

rereading later.

Example

In the original Bourne shell, you would type:

TERM=vt100

export TERM

In Bash and the Korn shell, you could type this instead:

export TERM=vt100

false

false

ksh88 alias for let 0. Built-in command in Bash and ksh93 that

exits with a false return value.

fc

fc [options] [first [last]]

fc -e - [old=new] [command]

fc -s [old=new] [command]

ksh88 and Bash. Display or edit commands in the history list. (Use

only one of -e, -l or -s.) first and last are numbers or strings speci-

fying the range of commands to display or edit. If last is omitted, fc

applies to a single command (specified by first). If both first and

last are omitted, fc edits the previous command or lists the last 16.

The second form of fc takes a history command, replaces old with

new, and executes the modified command. If no strings are speci-

fied, command is just reexecuted. If no command is given either, the

previous command is reexecuted. command is a number or string

like first. See the examples ...