[root@sylixos:/tmp]# help cmp
compare two file
cmp [file one] [file two]
[root@sylixos:/tmp]# cmp /apps/test /tmp/test2
file same!
[root@sylixos:/tmp]#
[root@sylixos:/tmp]#
[root@sylixos:/tmp]# touch test
[root@sylixos:/tmp]# ls
test            test2
[root@sylixos:/tmp]# cmp /apps/test /tmp/test
file not same!
[root@sylixos:/tmp]#