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.