cp COMMAND: cp command copy files from one location to another. If the destination is an existing file, then the file is overwritten; if the destination is an existing directory, the file is copied into the directory (the directory is not overwritten).
SYNTAX: The Syntax is cp [OPTIONS]… SOURCE DEST
#include<stdio.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<unistd.h>
void main()
{
int fd1,fd2;
char buf[60];
fd1=open("f2",O_RDWR);
fd2=open("f6",O_RDWR);
read(fd1,buf,sizeof(buf));
write(fd2,buf,sizeof(buf));
close(fd1);
close(fd2);
}