Bash Shell Scripting for file handling

Add two single column file side by side

  • Of same length
  
awk 'NR==FNR{_[NR]=$0;next}{print $1,$2,_[FNR]}' file2 file1

  • Of different length
awk 'NR==FNR { a[c=FNR]=$0; next }{ printf "%-8s\t%s\n", a[FNR], $0 }
END { for(i=FNR+1;i<=c;i++) print a[i] }' file2 file1


Cut n-th column of a file to separate file

  
awk < infile '{print $n}' > outfile

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