Typically scp should be already available on most Centos distributions.
If scp client is missing in your distribution simply install openssh-clients package using yum.

yum install openssh-clients

That’s it…
Confirm that scp works by simply typing scp to get help page

[root@linux ~]# scp
usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]
           [-l limit] [-o ssh_option] [-P port] [-S program]
           [[user@]host1:]file1 ... [[user@]host2:]file2

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