Package: createrepo

"createrepo" package binaries on CentOS:

/usr/bin/createrepo /usr/bin/mergerepo /usr/bin/modifyrepo

You may install this package on CentOS with yum install createrepo

"createrepo" package binaries on Debian:

/usr/bin/createrepo /usr/bin/mergerepo /usr/bin/modifyrepo

You may install this package on Debian with apt-get install createrepo