I have two files: file a with contents
1
2
3
4
5

file b with contents

6
3
5
8
9
10

i want go get file c which has the common contents of both files
so file c should have contents
3
5


Thank you

Try grep with the -f option:

Man Page for grep (POSIX Section 1) - The UNIX and Linux Forums

Regards

uniq -d file1 file2

unid -d file1 file1 is not working,i get file2 being made empty

---------- Post updated at 03:28 PM ---------- Previous update was at 03:12 PM ----------

is there any way i can use awk to do this

awk 'FNR==NR{a[$1];next} $1 in a}' file1 file2

If both files are sorted, you can simply use the comm utility:

comm -1 -2 filea fileb

Originally Posted by protocomm Code: uniq -d file1 file2

sort -n filea fileb | uniq -d

you can use comm or diff command, refer this example: Compare Two Files Using Comm