How to add text at the end of a line containing a string with a pattern in a text file?

Question

For example:

hello1.jpg
hello2.jpg
hello3.jpg

I would like to edit it so that it is like this:

hello1.jpg 0
hello2.jpg 0
hello3.jpg 0

I have tried:

sed -i '/(hello*)/ s/$/ 0/' hello.txt
perl -ipe 's/$/ 0/ if /hello/' hello.txt
sed -i '/^hello*/ s/$/ 0/' hello.txt

Tom Fenech · Accepted Answer · 2016-07-01 14:32:56Z

6

Your first approach was almost correct, aside from the fact that the parentheses (which aren't needed) were being interpreted literally:

$ sed '/hello/ s/$/ 0/' file
hello1.jpg 0
hello2.jpg 0
hello3.jpg 0

answered Jul 1, 2016 at 14:32

Tom Fenech

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Comments

Eric Renouf · Accepted Answer · 2016-07-01 14:33:08Z

3

You don't need the globs or other * uses in your sed command. The following works for me:

sed -e '/hello/ s/$/ 0/' hello.txt

and you can use the -i (with GNU) once you're sure that works for you

answered Jul 1, 2016 at 14:33

Eric Renouf

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instinct246 · Accepted Answer · 2020-01-22 18:09:01Z

1

awk '/hello/{print $0" "0}' filename

answered Jul 1, 2016 at 17:43

instinct246

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