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making some assumptions here....
Will something like this be helpful?
awk -f mani.awk myFile where mani.awk is:

BEGIN {
tab=sprintf("\t")
}

function trim(str)
{
sub("^([ ]*|" tab...

You have told us that the whole 150 character fixed length line is a key. You have said you need to identify a unique patter to act as a primary key. You have said that you need to identify the...

Hi manikandan23...

In post #1 you quote that your line length is 150 bytes and in post #5 it has changed to 150 characters.
Are some of these characters Unicode or pure ASCII from whitespace to...