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Sorry, I have another question...
if the file has different number of column how can I do it?
I saw that with while read line it is possible to read all line, but how can I define a number of...

Yes, It works! Could you explain me how work "while read"?
How does it understand to put the values in the variables?
I know that maybe it is a stupid question but I have never used that command. ...

Dear Robin,
thank you for your reply!
No, it isn't a homework, I am starting to use bash script so I have some problem :(
I know that I can print a value of a column with awk + print option, but...

Hello!
I need help :) I have a file like this:

AA BC FG

RF TT GH

DD FF HH

(a few number of rows and three columns) and I want to put the letters of each column in a variable step by...