SpiderOak provides an easy, secure, and consolidated free online backup, 
sync, sharing, access, and storage solution for Linux (and others).

* Access all your data in one de-duplicated location
* Configurable multi-platform synchronization
* Preserve all historical versions & deleted files
* Share folders instantly in web ShareRooms w / RSS
* Retrieve files from any internet-connected device
* Comprehensive 'zero-knowledge' data encryption
* 2 GBs Free / $10 per 100 GBs / Unlimited devices