UNIX for Dummies Questions & Answers

Hi people,

Is this possible and if so any tips are very welcome.

Im trying to do the following:


this is what I have:
800__1__
this is what I want:
8000010
12345678


Im only interested in postions 1,2,4,5,6,7 and if they have a white space(given a underscore for clarity) replace them with a zero. Take for instance position 8 that has a white space but is not one of the positions I'm interesed in so I want to ignore this position.

this is only a sample of the full size.

any idea how to by this ?

Much appreciated if you do help.

gnu sed:

Code:

sed 'h;s/.......//;x;s/\(.......\).*/\1/;s/ /0/g;G;s/\n//'