Package: cloud-init

"cloud-init" package binaries on CentOS:

/usr/bin/cloud-init /usr/bin/cloud-init-per

You may install this package on CentOS with yum install cloud-init

"cloud-init" package binaries on Debian:

/usr/bin/cloud-init /usr/bin/cloud-init-per

You may install this package on Debian with apt-get install cloud-init