Shell Programming and Scripting

fgrep -v -f 1.txt 2.txt > 3.txt

 1
 2
 4
 6
 8
 3
 g
 f

 1
 x
 z
 3
 m
 0
 8

 grep -Fvf 2.txt 1.txt && grep -Fvf 1.txt 2.txt

 2
4
6
g
f
x
z
m
0

 grep -Fxf 2.txt 1.txt
1
8
3
 
grep -Fxf 1.txt 2.txt
1
3
8

awk 'FNR==NR{A[$1]=$1;next} ($1 in A){print $1 >> "similar_ones.txt";delete A[$1];next} !($1 in A){print $1 >> "dissimilar_ones.txt"} END{for(i in A){print A[i] >> "dissimilar_ones.txt"}}'  Input_file1   Input_file2

cat similar_ones.txt
1
3
8

cat dissimilar_ones.txt
x
z
m
0
4
6
f
2
g

awk 'FNR==NR{
             A[$1]=$1;
             next
            }
     ($1 in A){
                print $1 >> "similar_ones.txt";
                delete A[$1];
                next
              }
     !($1 in A){
                print $1 >> "dissimilar_ones.txt"
               }
     END{
                for(i in A){
                                print A[i] >> "dissimilar_ones.txt"
                           }
        }
    '  Input_file1   Input_file2

grep -Fvf 2.txt 1.txt && grep -Fvf 1.txt 2.txt

grep -Fvf 2.txt 1.txt ; grep -Fvf 1.txt 2.txt

grep -Fxvf 2.txt 1.txt; grep -Fxvf 1.txt 2.txt

grep -Fxf 2.txt 1.txt

grep -Fxf 1.txt 2.txt

 { grep -Fvf 2.txt 1.txt && grep -Fvf 1.txt 2.txt; } > 3.txt

grep -Fxf 1.txt 2.txt > 3.txt