Good afternoon- ECN staff members need to patch and reboot ~560 of our redhat linux workstations and servers to fix a serious vulnerability in glibc, a foundational library for virtually all services. Essentially, this is all ECN supported RedHat Enterprise version 6 machines. We plan to take a two-stage approach to try to minimize disruption, and give us a smaller subset of potential problems to work through. Please try to not have running jobs during these days, you run the risk of job interruption. 1. On Tuesday, March 1st, all "standalone" linux machines will be rebooted. That is to say, any/all machines which do not share data via filesystems via NFS and/or Samba/CIFS services. Standalone machine are typically used by individuals in their lab or office. 2. On Thursday, March 3rd, all of the "homeserver" machines, which do serve filesystems to other machines via NFS and/or Samba/CIFS, will be rebooted. If you are interested in further details of the vulnerability, this is a good place to start:http://www.kb.cert.org/vuls/id/457759 If you are able to have your machine rebooted sooner, or if the proposed schedule imposes a hardship upon you/your users, please contact ECN via the hardware queue (email hardware@ecn.purdue.edu) and we will do our best to work with you. Thank you for your patience while we attempt to address this serious matter. Rich Franks, Systems Engineer Engineering Computer Network