UNIX for Dummies Questions & Answers

# cat file1.txt
this is line one 
this is line two
this is line three
this is line four
this is line five

# cat file2.txt
this is line two
this is line three

# cat my_script.ksh
#!/bin/ksh

i=1
y=1
myfunc()
{
exec < file1.txt
while read line ; do
file1[i]=$line
if [[ ${file1[i]} = ${arr2[y]} ]] ; then
echo ${file1[i]} and ${file2[y]} are the same.
sed ''$i'd' file1.txt > new.txt
mv new.txt file1.txt
else
echo ${file1[i]} and ${file2[y]} are not the same.
fi
(( i=i+1 ))
done
return
}
exec < file2.txt
while read line2 ; do
file2[y]=$line2
myfunc     # calling the function
(( y=y+1 ))
done
cat file1.txt

this is line one
this is line three
this is line four
this is line five

this is line one
this is line four
this is line five

grep -v -f file2.txt file1.txt

grep -vxf file2.txt file1.txt