Shell Programming and Scripting

 
    $1  $2  $3
613212, 36, 57
613212, 36, 10
613212, 36, 10
677774, 36, 57
619900, 10, 10

613212, 36, 57
613212, 36, 10
613212, 36, 10

677774, 36, 57
619900, 10, 10

awk ' { arr[$0]++ } END { for( str in arr  ) { if ( arr[str] = 1 ) print str " " arr[str] } } ' /directory/mainfile.txt | >/directory/file1.txt
 
awk ' { arr[$0]++ } END { for( str in arr  ) { if ( arr[str] > 1 ) print str " " arr[str] } } ' /directory/mainfile.txt | >/directory/file2.txt

awk ' {arr[$1]++; next} END{for (i in arr) {print arr[i], i }} ' mainfile.txt > t.tmp
awk ' FILENAME=="t.tmp" {arr[$2]=$1; next}
       FILENAME=="mainfile.txt" { if(arr[$1]>1) 
                                                   {print$0 >"file1.txt" }  
                                             else 
                                                  {print $0 >"file2.txt" } }' t.tmp mainfile.txt

$ cat /mainfile.txt
613212 36 57
613212 36 10
613212 36 10
677774 36 57
619900 10 10

$ cat /t.tmp
1 619900
3 613212
1 677774

$ cat /file1.txt  -  *empty*

$ cat /file2.txt
613212 36 57
613212 36 10
613212 36 10
677774 36 57
619900 10 10

awk 'NR==FNR && ++a[$1] >1{b[$1]=1} NR!=FNR{if(b[$1]) {print >>"file1"} else {print >> "file2"}}' file file

awk -F, 'A[$1]++{print>"file2.txt";next}1' mainfile.txt >file1.txt

awk -F, 'NR==FNR{a[$1]++;next}{print > (a[$1]>1?"File1.txt":"File2.txt")}' file file