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Question

what is the sed command to swap 2 character strings in the same 1 line

Posted March 7, 2016 6.9k

DigitalOcean Linux Commands

example
input file: 03-06-2016
output file: 2016-03-06

By:

odg8

2 comments

seabrook2015 March 7, 2016
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You need to use the substitute command, match and mark stuff on the left with ( ) and recall it on the right with \1 \2 \3, etc. In this case sed -n ’s/([0-9][0-9])-([0-9][0-9])-([0-9][0-9][0-9][0-9])/\3-\1-\2/’ <inputfile. Untested.
Dick S.
seabrook2015 March 7, 2016
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Oops – this editor lost the backslashes in front of ALL the left and right parentheses in the above. Kindly insert them while I figure out how to deal with this editor!
Dick S.

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1 answer

mragusa March 9, 2016

Hello,

The following post on stackoverflow may be a great resource:
http://unix.stackexchange.com/questions/21061/cleanly-swap-all-occurences-of-two-strings-using-sed

You may also check out: http://www.cyberciti.biz/faq/howto-sed-substitute-find-replace-multiple-patterns/

Please let us know if there is anything else we can help you with.

Best,
Mike
DigitalOcean Support
Check out our community for great tutorials, articles and FAQs!
https://digitalocean.com/community

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