https://ubuntu.com/certified/platforms/8011
Cisco UCS C220 M4 (Intel Series v3) certified with Ubuntu. | Ubuntu
Platform that is certified for use with Ubuntu.
cisco ucs c220 m4intel seriesv3certifiedubuntu
https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/c/sw/gui/config/guide/3_0/b_Cisco_UCS_C-Series_GUI_Configuration_Guide_for_HTML5_Based_Servers_301.html
Cisco UCS C-Series Integrated Management Controller GUI Configuration Guide for C220 M4, C240 M4,...
Cisco UCS C-Series Integrated Management Controller GUI Configuration Guide for C220 M4, C240 M4, C460 M4, and C3160 M3 Servers, Release 3.0