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about how to write a shell script to read the text file and perform transform

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#1 tester111


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Posted 05 November 2017 - 08:48 AM

i have a text file as belows, it includes 2 columns, 1st is the column name, 2nd is the file_name




column_name    file_name

col1                      file1

col2                      file2

col3                      file1

col4                      file1

col5                      file2


now, i would like to output below result to a text file, which returns all the column name by file name as belows.


file_name     column_name

file1               col1,col3,col4

file2               col2,col5



how can i write a shell script to read the data_file.txt line by line and output the result as above by file name.

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#2 tester111

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Posted 05 November 2017 - 10:59 AM

anyone knows~

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