Hello Franklin,

Many thanks for your reply.

I tried both awk and grep commands but get syntax errors.

For the grep command the error is

>grep -v -f old new
grep: illegal option --f

For the awk command this is what i get

>awk 'NR==FNR{a[$0];next}!($0 in a)' old new
awk: syntax error near line 1
awk: bailing out near line

could you let me know where i am going wrong please.

Thanks again