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Top Forums Shell Programming and Scripting Print unique names in each row of a specific column using awk Post 302743305 by radoulov on Wednesday 12th of December 2012 12:23:11 PM
Old 12-12-2012
If you want/prefer to use awk and you have a recent GNU awk implementation,
you could reconstruct the records after the change exactly (including variable FS')
and preserve the original formatting:

Code:
awk '{
  split($0, t, FS, s)
  for (i = 0; ++i < NF;)
    printf "%s", $i s[i]
  n = split(t[i], tt, fs)
  delete _; lf = x
  for (i = 0; ++i <= n;)
    lf = lf (_[tt[i]]++ ? x : tt[i] fs) 
  print substr(lf, 1, length(lf) - 1)
  }' fs=\; infile

 

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COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME
colrm -- remove columns from a file SYNOPSIS
colrm [start [stop]] DESCRIPTION
The colrm utility removes selected columns from the lines of a file. A column is defined as a single character in a line. Input is read from the standard input. Output is written to the standard output. If only the start column is specified, columns numbered less than the start column will be written. If both start and stop columns are spec- ified, columns numbered less than the start column or greater than the stop column will be written. Column numbering starts with one, not zero. Tab characters increment the column count to the next multiple of eight. Backspace characters decrement the column count by one. ENVIRONMENT
The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7). EXIT STATUS
The colrm utility exits 0 on success, and >0 if an error occurs. SEE ALSO
awk(1), column(1), cut(1), paste(1) HISTORY
The colrm command appeared in 3.0BSD. BSD
August 4, 2004 BSD
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