how to delete line with matching text and line immediately after

orahi001 · #1 (**permalink**) 01-11-2008

hello experts,

I have a file: File1

Sample Test1
This is a Test
Sample Test2
Another Test
Final Test3
A final Test

I can use sed to delete the line with specific text

ie: sed '/Test2/d' File1.txt > File2.txt

How can I delete the line with the matching text and the line immediately after.

so My resulting file would look like

File2:
Sample Test1
This is a Test
Final Test3
A final Test

thanks

gus2000 · #2 (**permalink**) 01-11-2008

Code:

# echo "1\n2\n3\n4\n5\n6" | sed -e '/2/{N;d;}'
1
4
5
6

drl · #3 (**permalink**) 01-11-2008

Hi.

Also:

Code:

% echo "1\n2\n3\n4\n5\n6" | sed '/2/,+1d'
1
4
5
6

According to man sed:

Quote:

addr1,+N
Will match addr1 and the N lines following addr1.

cheers, drl

gus2000 · #4 (**permalink**) 01-11-2008

Hmmm yes but that didn't work on my sed (AIX). YMMV!!!

drl · #5 (**permalink**) 01-11-2008

Hi, gus2000.

The man page for the GNU version did not say that that was an extension. I'll try to see if that's POSIX. The version on FreeBSD 4.1 man page:

Quote:

The sed utility is expected to be a super-set of the IEEE Std 1003.2
(``POSIX.2'') specification.

and the "+1" syntax also did not work there ... cheers, drl

ghostdog74 · #6 (**permalink**) 01-11-2008

shell:

Code:

#!/bin/sh
f=0
while IFS= read -r line
do 
 case $line in
   *pattern* ) f=1; continue ;;
 esac
 if [ "$f" -eq 1 ]; then   
    f=0 
    continue
 else
    echo $line
 fi
done <"file"

awk:

Code:

awk '/pattern/{getline;next}{print}' file

orahi001 · #7 (**permalink**) 01-15-2008

I used the awk suggestion below since I was already using awk for something else...It worked great

thanks

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