Using the tar utitlity, give the specific command(s) you would use to move files a, b, and c from directory
/users/student/rios to /etc/tmp
( cd /users/student/rios && tar cf - a b c) | (cd /etc/tmp && tar xvpf - )
can someone tell me what tar cf does and why we need the &&. also does the | mean we are moving the items to the left? why the xvpf - ?