Compute nodes and desktop machines WILL BE REBOOTED on Thursday (October 23rd).  Updates will be applied to machines between 7:00pm and midnight. In an effort to try and minimize any corrupted files or lost work, please save all your data and logout of any Linux systems before 7:00pm. Many of the updates have already been made on several Linux machines in the computer lab located in WWH 229. We urge people to test any packages that are critical to their work and let us know if they encounter any problems before the updates occur.

These machines have received the kernel update and all of the software updates: 

Some significant software updates include (but are not limited to):

Linux kernel (automatic REBOOT)
various php and perl packages
libre office
...and many more

This is quite a large update that signifies the transition from RHEL 6.5 to 6.6.