How to print last two columns using awk

Question

All I want is the last two columns printed

User · Answer

using gawk exhibits the problem    gawk    print  NF-1   NF   filename 1 2 2 3 -1 one -1 three   cat filename 1 2 2 3 one one two three   I just put gawk on Solaris 10 M4000  So  gawk is the cuplrit on the  NF-1 vs    NF-1  issue    Next question what does POSIX say  per    http   www opengroup org onlinepubs 009695399 utilities awk html   There is no direction one way or the other  Not good   gawk implies subtraction  other awks imply field number or subtraction   hmm

User · Answer

Please try this out to take into account all possible scenarios  awk   print   NF-1  quot  t quot  NF    file  or awk  BEGIN OFS  quot  t quot    file  or awk   print   NF-1    NF   print   NF-1    NF   file

User · Answer

You can make use of variable NF which  is set to the total number of fields in the input record   awk   print   NF-1    t   NF   file   this assumes that you have at least 2 fields

User · Answer

try with this   cat  tmp topfs txt  dev sda2      xfs        32G   10G   22G  32     awk print last column   cat  tmp topfs txt   awk   print  NF    awk print before last column   cat  tmp topfs txt   awk   print   NF-1    32   awk - print last two columns   cat  tmp topfs txt   awk   print   NF-1    NF   32

User · Answer

jim mcnamara  try using parentheses for around NF  i  e     NF-1  and   NF  instead of  NF-1 and  NF  works on Mac OS X 10 6 8 for FreeBSD awkand gawk    echo   1 2 2 3 one one two three     gawk   if  NF  gt   2  print   NF-1     NF        output    1 2   2 3   two three

User · Answer

awk   print  NF-1   NF    inputfile   Note  this works only if at least two columns exist   On records with one column you will get a spurious  -1  column1

[awk] How to print last two columns using awk

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