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sed - Print Edited Line Along With Original Line

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# 1  
Old 10-30-2013
sed - Print Edited Line Along With Original Line
Hi,

I have an input file like this

Code:
line1

line2

line3 hello unix how are you

This is what I am expecting my output to be

Code:
line1

line2

#line3 hello unix how are you

line3 hello

Basically, I would like to comment out the 3rd line and in addition print another line. It would be good to know if I can tell the script what my fourth line should be.
# 2  
Old 10-30-2013
Code:
sed -e 'h;s/^\(line3 .*\)/#\1/p;x;s/^line3 \([^ ]*\).*/\nline3 \1/'

Because of the '\n', may require GNU sed or a contemporary sed.
This User Gave Thanks to cjcox For This Post:
jacobs.smith
# 3  
Old 10-30-2013
Quote:
Originally Posted by cjcox
Code:
sed -e 'h;s/^\(line3 .*\)/#\1/p;x;s/^line3 \([^ ]*\).*/\nline3 \1/'

Because of the '\n', may require GNU sed or a contemporary sed.
Thanks cjcox.

But, there are files where I have to print

Code:
line3 how or line3 you

# 4  
Old 10-30-2013
Try something like:
Code:
awk '$0~s{$0="#" $0 ORS r}1' s=line3 r="line3 how or line3 you" file

or
Code:
awk '$1==s{$0="#" $0 ORS r}1' s=line3 r="line3 how or line3 you" file

This User Gave Thanks to Scrutinizer For This Post:
jacobs.smith
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