How to copy string before comma in file and paste it later in file after slash-CodePudding

How can I use sed to copy before comma and paste after slash in a file?

Example:

text1,Information /
text2,Information /
text3,Information /

and I want

text1,Information /text1
text2,Information /text2
text3,Information /text3

CodePudding user response：

This works with your example:

sed -r 's@(.*),(.*)/@\1,\2/\1@' <file_path>

The idea is that groups (between parentheses) are referenced in the substitution part.

CodePudding user response：

This might work for you (GNU sed):

sed -E 's/([^,]*).*/&\1/' file

Capture everything before the , and append to the end of the line.