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Oh yes!! That is an awsome solution. Thanks a lot ! :b:

I just edited it with codes danmero.

Your solution was not able for me. I can't to look the old value from a file every time i needs to change it. I must that the shell do it by itself. But thanks...

Hello everybody:
I want to replace any field $2 of any file line (f.i. test.txt) matching $1 with a shell variable.


$ cat test.txt
F 0
B A
H -12.33

Now I'm going...