Here is the latest compatibility matrix for Harvest updated on October 25th 2017
https://support.ca.com/us/product-content/status/compatibility-matrix/ca-harvest-software-change-manager-v13_0-compatibility-matrix.html
The below entries are specific for Linux -Redhat and Suse versions supported list
Novell SUSE Linux Enterprise Server*** System z 10
11
x86 and x86-64
Note: Please refer download section for Linux x86-64 download details 10
11
RedHat Linux*** System z ES 5
ES 6
x86 and x86-64
Note: Please refer download section for Linux x86-64 download details ES 6
ES 7
There is no Debian version listed and a knowledge article was also posted on our knowledge base.
https://support.ca.com/us/knowledge-base-articles.TEC1289125.html
You may need to to raise an "idea" in our Harvest communities.