6
votes
2answers
143 views

Replace \n by a newline in sed portably

I'm so confused with GNU sed, POSIX sed, and BSD sed's myriad of options. How do I replace literal \n with the newline character using these three sed types?
13
votes
6answers
513 views

Replace string containing newline in huge file

Anyone know of a non-line-based tool to "binary" search/replace strings in a somewhat memory-efficient way? See this question too. I have a +2GB text file that I would like to process similar to what ...
1
vote
3answers
50 views

end of line in linux and mac

I am analyzing a text file looking for a path that is written after a line that starts with "output". The line is something like output xyz/mypath/ and I want to extract xyz/mypath without the ...
4
votes
2answers
159 views

\n prints an n instead of a newline when using sed in MaxOSX

It's a general problem when I use sed but \n works when I use it outside of sed. This is one example of what I get with sed. I have the file myfile with the following content: 1 2 3 4 5 When I use ...
2
votes
2answers
4k views

Can sed replace new line characters?

Is there an issue with sed and new line character? I have a file test.txt with the following contents aaaaa bbbbb ccccc ddddd The following does not work: sed -r -i 's/\n/,/g' test.txt ...
1
vote
2answers
158 views

Why the inconsistency with using cat vs. echo piped to this sed command?

Inspired by this question: sed: N command does not read single line I wanted to understand why there appears to be an inconsistency between the following 2 commands: #1. echo This command produces ...
1
vote
1answer
327 views

sed: N command does not read single line

Why sed's N command does not read single line? # single line without \n $ echo -en 'abc' | sed -n 'N;p' $ # I expected 'abc' # single line with \n $ echo -en 'abc\n' | sed -n 'N;p' $ # I expected ...
1
vote
2answers
123 views

Remove 2 and 3 newlines in a text file but not 1

I'm developing on a max osx 10.8 and have no preferences to which tool to use probably sed but it doesn't matter. Update after comment: The input file uses windows new lines if that's complicates ...
1
vote
1answer
168 views

Why is it that , to newline is working but newline to , is not working sed?

I have got a text file with a list of first names, and I am trying to replace newline with ,. Here is the command I am using sed 's/\ /,/g' file while the reverse is working sed 's/,/\ /g' file ...
4
votes
3answers
486 views

How to skip file in sed if it contains regex?

I currently use the following simplified command to remove trailing whitespace and add a newline at end of file where needed: find . -type f -exec sed -i -e 's/[ \t]\+\(\r\?\)$/\1/;$a\' {} \+ As ...
5
votes
2answers
13k views

Removing all spaces, tabs, newlines, etc from a variable?

This is the error I am getting and it's failing because of a variable whose value is supposed to be 2 (I am getting this using a select * from tabel). I am getting spaces in that variable. + 0 != ...