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The following is a compilation of useful one-line scripts for sed. The original was compiled by Eric Pement Dec; v5. One could accomplish a similar way of renaming files using pure Bash :.

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By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Setup a private space for you and your coworkers to ask questions and share information. If foo and bar are not expected to contain new lines, then you must beware that.

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Basically, what we want to do is to remove all the newlines optionally replacing them with something else, say spaces from a file, so from this input:. If newlines are replaced by spaces, which seems to be a somewhat more common requirement, then we want this:. Here I'm going to assume that the output should be a regular text stream, that is, correctly terminated with a newline character.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Setup a private space for you and your coworkers to ask questions and share information. As you can see, using sed for this otherwise simple problem is problematic.

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Lots of sed newcomers ask why the following snippets of code, or some variation thereof, don't work they actually work as expected; it's just that the results are not what they think should be :. To understand why those "don't work", it's necessary to look at how sed reads its input. Basically, sed reads only one line at a time and, unless you perform special actions, there is always a single input line in the pattern space at any time. That line does NOT have a trailing newline characters, because sed removes it.

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By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. It only takes a minute to sign up. I've been using sed for quite some time but here is a quirk I came around with, which I am not able to resolve.

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