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SED: How can I replace a newline (\n)?
I have the file with newlines. and I am trying this
sed -re 's/\n//' sample1.txt and it's not working
It's showing output with newlines and not removing them.
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user175386049
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2 Answers
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sed splits the input it receives at newlines and removes them before running the sed script, i.e. the script will never see then newlines. Use tr instead:
tr -d '\n'
Or if you insist on sed, use Guru's looped solution which re-inserts \n with the N command.
Thor
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Do you have any better solution with sed only. Thanks for `tr` but i just want to know – user175386049 Jan 08 '13 at 06:18
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@user1953864: No, this is not a job for sed, even with the looped solution you end up with a newline at the end. You should probably come up with a minimal example of what you're trying to do. – Thor Jan 08 '13 at 08:01
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Use double quotes:
sed -e "s/\n//" sample1.txt
If your intention is to try and join all lines in a file:
sed -e :a -e 'N;s/\n//;ta' sample1.txt
Guru
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1@user1953864 : `sed` processes file line by line. so try `tr` instead – Prince John Wesley Jan 08 '13 at 05:15
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@user1953864 : updated solution since you are looking to join all lines in a file – Guru Jan 08 '13 at 05:21
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@user1953864: why do you need to use sed, [what are you actually trying to do](http://www.perlmonks.org/index.pl?node_id=542341)? Note that the second solution loads the entire file into memory. – Thor Jan 08 '13 at 05:31
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1-1 What's this? I'm seeing answers like this every day - misdirected guesses that changing to *weaker* quotes would fix a command. – tripleee Jan 08 '13 at 05:38
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@thor , Actually i am learning sed and thats why i wanted to get the solutiojn in sed. but thanks for telling that it will put all the file in memory. doing it on 2 Gb file will halt the sysytem. Any other way with sed?? – user175386049 Jan 08 '13 at 06:15