How to install Docker on Linux.
ArcGIS Enterprise 11.5 is the last version in the 11.x series. Following ArcGIS Enterprise 11.5, ArcGIS Enterprise 12.0 will be released as a short-term support version for Windows and Linux.
ArcGIS 10.6 and 10.6.1 (Desktop (ArcMap) and Enterprise) will be RETIRED on January 1, 2024.
Please refer to the Product Life Cycle on the Esri Support site.
Enterprise PLC - https://support.esri.com/en-us/products/arcgis-enterprise/life-cycle
ArcMap PLC - https://support.esri.com/en-us/products/arcmap/life-cycle