CODEWITHSUNDEEP
macosterminalnewlinecarriage-returntr
Howard Sherman
Howard Sherman

Reputation: 99

OS X Terminal: tr: how to add multiple carriage returns?

I have a file that is formatted like this:

> ABC
1
2
> DEF
3
4

I would like to use tr to replace each > with 4 carriage returns, so it looks like:

 ABC
1
2




 DEF
3
4

I tried the following in the Terminal: cat input | tr ">" "\n\n\n\n" > output However, this only adds one carriage return between the two blocks of data, like this:

 ABC
1
2

 DEF
3
4

How can I get it to recognize the multiple carriage returns? Thanks!

Upvotes: 2

Views: 2158

Answers (1)

blueberryfields
blueberryfields

Reputation: 50328

tl;dr

tr is the wrong tool for the job; try something else (like sed)

tr (text replace) only does 1:1 replacement - so it will only replace one character, with another, at a time. I think your current command replaces > with /n, >> with /n/n, >>> with /n/n/n and >>>> with /n/n/n/n.

try using sed instead, probably something like this (untested!):

cat input | sed $'s/>/\\\n\\\n\\\n\\\n/g' > output

Upvotes: 2

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