There will be some brief interruptions of various services including the shell servers because of a serious vulnerability in glibc.
I will be applying updates to various systems as they become available and then rebooting so that old code no longer runs.
This will cause a brief interruption of all services. The main file server and host machines take longer to reboot so I will do those after 10PM tonight. There will be about twenty minutes between 10pm-midnight where virtually everything grinds to a halt while this is done.