To install:
sudo apt-get install libreoffice-writer

Usage:
lowriter --headless --convert-to pdf your_word_doc.doc

Scenario = you have wrongly initialize a new HDD a single disk but you would like to be added as RAID1 disk.

QNap support team suggested to remove all partition and reboot NAS

This should be done connecting the second disk to a computer, delete volume and partition, and connect disk back into the NAS, which is quite boring.
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Scenario = replace a disk in QNAP TS-212 with RAID 1 configuration active

RAID rebuild should start automatically, but some times it could happen you got stuck with 1 Single Disk + 1 Mirroring Disk Volume:

The workaround is this:
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http://john.de-graaff.net/wiki/doku.php/links/openvpn

http://wadihzaatar.com/?p=11

http://www.nirsoft.net/utils/product_cd_key_viewer.html

http://www.magicaljellybean.com/keyfinder/