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Thank you for your answers !
It fixes my problem

Max

Hello,

I would like to extract one or two fields of a line.

At the moment, I am extracting the first field of a line:
command | cut -f 1 -d '.' > file

The line can have two or three fields...

I have solved the problem by looking for in only in the second field which works for my purpose.

grep -i " *&.*[.].*in.*[.]"

Max

Hello,

I have a string of the form " &x.y.z"
I would like to grep all the lines when "in" can be found in either x or y. How to write the corresponding regular expression ? I have tried the...

That's perfect !!!!

Thanks a lot

Max

Hello,

I would like to perform a search of several different strings in different files. I have the ouput of a unix command X which is for instance:

aaa
bbb
ccc

and I would like to look...

The solution with sed worked fine as well.

Thanks !!
Max

Brilliant, that's working like magic !

However, I don't understand at all the syntax of your code so I'll have a look at awk in further details.

Thanks
Max

Yes, this is part of the process of updating many C files which cannot be reasonably made by hand.

by using the following:

sed '/#include/ a\
#include "myHeader.h"' input > ouput

it adds my...

Hello,

I have got a C file in which I would like to add an include statement of my own.
There are already a few include statements and mine should come right after the last existing one (to be...