1) updated condor from 25.0.9 to 25.0.12 to address the security issues

 2) updated dcache from 11.2.4->11.2.5, the update last about 1hour, and AGLT2 was set offline for half an hour.  No downtime was declared. 

3) Updated and rebooted all nodes but the UM work nodes (due to Lustre version limit) to the latest 5.14.0-687.25 and 26 kernel to address several CVE fixes and the latest firmware when they apply

4) plan to swap a Rack in the UM Tier2 room, this Rack hosts about 12% of the AGLT2 data, we set them as read only 4 days in advance, and not declare downtime. The work is estimated to last a whole day.