how to achicve translate in unix

Shell Programming and Scripting
1

hi,
i have file with 4 columns, the first column contains 10 numbers. i want to replace t the numbers (u can say i want to use cryptography). i want to replace 1 with 4, 2 with 5, 3 with 9.....
how can i achieve this in unix. :confused:

2

When the replacement is made on the whole record, you can use the tr command.

In your case, the replacement must be made just in one field.
A possible way to do the work is to use an awk program like that :

#!/usr/bin/awk -f
BEGIN {
   CnvFrom = "0123456789";
   CnvTo   = "4590382617";
   Field   = 1;
}
{
   newField = ""
   for (i=1; i<=length($Field); i++) {
      char = substr($Field, i, 1);
      if (pos=index(CnvFrom, char))
         char = substr(CnvTo, pos, 1)
      newField = newField char
   }
   $Field = newField
   print
}

Jean-Pierre.