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Replace a special character with another one in a string using Linux regex

Hi everyone,

I am trying to replace the first period by a hyphen in following strings by using regex (?<=\d\d)\.

12345.678910-68597-19_A250_M007_001_1_1.abcde.fg

I am using sed command as sed 's/(?<=\d\d)\./-/' To make the output as follows:

12345-678910-68597-19_A250_M007_001_1_1.abcde.fg

However, in Linux its not working.

Can anyone help where I am making a mistake?

Thanks

linux regex
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written by eDNAuRNA • eDNAuRNA

1 answer

One possible solution is capturing the part before and after . and joining them with a -.

sed 's/^\([0-9]\+\).\(.*\)/\1\-\2/' <text>
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written by Arup Ghosh Arup Ghosh

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