Package: rhn-client-tools

"rhn-client-tools" package binaries on Debian:

/usr/bin/rhn_register /usr/sbin/rhn-channel /usr/sbin/rhn_check /usr/sbin/rhn-profile-sync /usr/sbin/rhn_register /usr/sbin/rhnreg_ks /usr/sbin/spacewalk-channel

You may install this package on Debian with apt-get install rhn-client-tools