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Full Discussion: grep sed
Top Forums UNIX for Dummies Questions & Answers grep sed Post 88691 by vino on Tuesday 8th of November 2005 05:31:43 AM
Old 11-08-2005
Quote:
Originally Posted by ericelysia
Is there a way to use the record number that is input by the user?
I initially was thinking:
Code:
sed -n -e '1,${number - 1}p' phonebook > tmp

But I am thinking this works like C++ or Java. I assume this is not right, because I do not see any arithmetic commands in this book that I have.
Thanks,
Eric
Why dont you calculate the new number outside the sed script.

Code:
NUM=$(($number-1))
sed -n -e "1,${NUM}p" phonebook > tmp

Havn't tested it tho'.
 

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LEARN ABOUT DEBIAN

imon

IMON(1) 						    Linux System Administration 						   IMON(1)

NAME

       imon - watch ISDN activities

SYNOPSIS

       imon [ -q] [-p phonebook]

DESCRIPTION

       imon is a ncurses based utility for watching ISDN activity.

OPTIONS

       -q   If	this  option  is  given,  the facility of terminatig the program by pressing 'Q' is disabled and the signals SIGHUP and SIGINT are
	    caught.  This option is intended for starting imon from within an rc script with redirecting input/output  to  some  otherwise  unused
	    virtual console at boot time.

       -p phonebook
	    is	used to supply imon with a phonebook file. The format of a phonebook file is very simple: Every line has two elements separated by
	    a TAB.  The first element is a phone number which can contain wildcards.  The second element is a descriptive string. For each  active
	    connection, this string is shown instead the phone number. Pressing 'S' toggles between display of strings and phone numbers. Pressing
	    'R' rereads the phonebook file in case of changes during program execution.

AUTHOR

       Fritz Elfert <fritz@isdn4linux.de>

SEE ALSO

       ttyI(4), isdnctrl(8), isdninfo(4).

isdn4k-utils-3.25						    1999/09/06								   IMON(1)
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