How to ovewrite two key values in unix

Question

I am having two files. Need to compare two files and overwrite the values from test2.txt to test1.txt by unix unix shell script. If anything Extra keys that should be added in test1.txt

Note: Need to overwrite only values not keys.

test1.txt

Name = krishna
Age =30
DOB = 30-Sep-94
Total Marks =375

test2.txt

Name = Ram
Age =35
DOB = 23-Aug-95
Total Marks =300
Remarks = He is very good

Expected o/p

Test3.txt

Name = krishna
Age =30
DOB = 30-Sep-94
Total Marks =375
Remarks = He is very good

Do you mean to add only the extra keys to the test1 file or also update all the keys in test1 that were found in test2? — Abishek Aditya, Sep 27 '19 at 10:53
I want an answer to this, do you want to do a) add only the extra keys to the test1 file, or b) add the extra keys to the test1 file and also update all the keys in test1 that were found in test2. Reply with a or b — Abishek Aditya, Sep 27 '19 at 11:24
I need o/p of b) add the extra keys to the test1 file and also update all the keys in test1 that were found in test2. — Krishnakumar Nagarajan, Sep 27 '19 at 12:54

score 1 · Answer 1 · answered Sep 27 '19 at 11:23

1

Using awk:

$ awk 'BEGIN{FS=" *="}NR==FNR{a[$1]=$0;next}{print ($1 in a?a[$1]:$0)}' file1 file2

Output:

Name = krishna
Age =30
DOB = 30-Sep-94
Total Marks =375
Remarks = He is very good

answered Sep 27 '19 at 11:23

James Brown

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How to ovewrite two key values in unix

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