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Top Forums Shell Programming and Scripting How to remove answers and explanation parts from a text file with lots of questions.? Post 303041669 by MadeInGermany on Monday 2nd of December 2019 02:32:34 AM
Old 12-02-2019
The task seems easy: delete the section between "Answer:" and "NO."
Doable with sed by means of the N command and a loop. But sed has a portability issue regarding N on the last line.
So awk is the first choice here.
Code:
awk '/^Answer:/{del=1} /^NO\./{del=0; print ""} del==0' test.txt

del==0 is true if del is not initialized. A true without action defaults to {print}.
This User Gave Thanks to MadeInGermany For This Post:
 

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USER(8) 						    BSD System Manager's Manual 						   USER(8)

NAME
user -- manage user login information on the system SYNOPSIS
user add -D [options] user add [options] user user del -D [options] user del [options] user user info [options] user user mod [options] user DESCRIPTION
The user utility acts as a frontend to the useradd(8), usermod(8), userinfo(8), and userdel(8) commands. The utilities by default are built with EXTENSIONS. This allows for further functionality. For a full explanation of the options available, please see the relevant manual page. EXIT STATUS
The user utility exits 0 on success, and >0 if an error occurs. FILES
/etc/skel/.[A-z]* Skeleton files for new user /etc/usermgmt.conf Configuration file for user, group(8) and the backend commands mentioned above. SEE ALSO
chpass(1), group(5), passwd(5), usermgmt.conf(5), useradd(8), userdel(8), userinfo(8), usermod(8) HISTORY
The user utility first appeared in NetBSD 1.5. It is based on the addnerd package by the same author. AUTHORS
The user utility was written by Alistair G. Crooks <agc@NetBSD.org>. BSD
November 16, 2005 BSD
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