How to Reboot ReadyNAS Pro 4 through command line?

Just before restarting the ReadyNAS This is the result of tail .../frontview/error.log

[Wed May 16 09:33:01 2012] [notice] Graceful restart requested, doing restart
[Wed May 16 09:33:02 2012] [error] [client 192.168.1.10] shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory, referer: https://192.168.1.30/admin/
apache-ssl: Could not reliably determine the server's fully qualified domain name, using 192.168.1.30 for ServerName
[Wed May 16 09:33:03 2012] [warn] RSA server certificate CommonName (CN) `192.168.168.168' does NOT match server name!?
[Wed May 16 09:33:03 2012] [notice] Apache/2.2.6 (Debian) mod_ssl/2.2.6 OpenSSL/0.9.8c DAV/2 mod_apreq2-20051231/2.6.0 mod_perl/2.0.2 Perl/v5.8.8 configured -- resuming normal operations
[Wed May 16 09:33:32 2012] [error] [client 192.168.1.10] File does not exist: /frontview/ui/resource/html/images, referer: https://192.168.1.30/admin/
[Wed May 16 09:34:35 2012] [error] [client 192.168.1.10] File does not exist: /frontview/ui/resource/html/images, referer: https://192.168.1.30/admin/

ReadyNAS IP is 192.168.1.30 and the server I use to connect to NAS has the IP 192.168.1.10

The result of df -h is:

Filesystem            Size  Used Avail Use% Mounted on
/dev/md0              4.0G  715M  3.1G  19% /
tmpfs                  16K     0   16K   0% /USB
/dev/c/c              2.7T  754G  2.0T  28% /c
tmpfs                  50M     0   50M   0% /var/replicate/shm
/dev/sdf1             1.9T  777G  1.1T  42% /USB/USB_HDD_1

Now that the backup is working fine, I prefere not to touch the apache-ssl for now. But if the frontView goes down again I'll try restarting apache-ssl rather than restarting the NAS. Keep you updated on that...

Tried the SSH tunnel, it works fine now. I should try that when the frontview is down.

Would be great to hear your comments on the last error log I inserted above.

Thanks for the help.