installation.md

@@ -87,6 +87,7 @@ Known to work on:
 | Operating System | Last Tested |
 | ---------------- | ----------- |
 | CentOS 7.9.2009  | 2021-09-24  |
+| Ubuntu 18.04.5   | 2021-09-24  |
 
     mkdir glance
     cd glance
@@ -141,6 +142,3 @@ If you want to do development on Glance, skip the "pip install ...uwglance..." s
     git clone https://gitlab.ssec.wisc.edu/evas/UW-Glance.git
     cd ./UW-Glance/pyglance
     python setup.py develop
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