When you are mounting your nfs in CentOS, and this error appeared
mount: wrong fs type, bad option, bad superblock on ftpback-xxx-xx.ip-xxx-xx-xx.net:/export/ftpbackup/myserver, missing codepage or helper program, or other error (for several filesystems (e.g. nfs, cifs) you might need a /sbin/mount.<type> helper program) In some cases useful info is found in syslog - try dmesg | tail or so.
Reason for error
You do not have NFS util in your machine
yum install nfs-utils -y