cmp <file one> <file two>

[root@sylixos:/root]# help cmp            
compare two file
cmp [file one] [file two]
[root@sylixos:/root]# 

[root@sylixos:/apps/test]# ls
hello.c  hello2.c  temp.txt
[root@sylixos:/apps/test]# cmp hello.c temp.txt
file not same!
[root@sylixos:/apps/test]# cmp hello.c hello2.c
file same!
[root@sylixos:/apps/test]#