Emoncms v9.7 has just been merged into stable branch, see full change log. This release includes several nice changes to the admin page that @Andy_Taylor has been working on.
Improved system stats
File system Disk space usage
RAM usage, CPU temp (Raspberry Pi only)
Shutdown / Reboot via admin web interface (Raspberry Pi only)
The shutdown / reboot button functionality requires ,/sbin/shutdown appended onto the end of the www-data line in /etc/sudoers. We will roll out an emonPi update soon to automate this change for all emonSD users. Until the change in sudoers file is made the shutdown / reboot button will not appear.