backup

The convenience (can actually be used) and security balance is the real magic in this space. For example, i am at this moment fairly afraid that i've forgotten my SpiderOak passphrase and lost the backup piece of paper. On my ToDo list for months has been check if i can still access my data and then re-up the subscription. I own my failings, but i suspect other humans share them. Perhaps tiers of data security in one service could be an answer? One tier, the lowest, can be recovered with a password reset to e-mail, so the private key actually stored somewhere with you.

if we all backup each other's data with whatever space is available on our various hard drives, we may be able to save a lot of money and be better for the environment too.

Some really good software for both the client and the storage ends are needed to make this work well. Probably something as far as distributing the locations of encrypted backups also...

https://help.ubuntu.com/community/rsync

/var/local/db-backup/sqldump/

git checkout old version
git get old copy
git branch checkout revision

http://stackoverflow.com/questions/849265/do-you-need-to-create-a-branch-to-check-out-a-specific-git-revision

basic git commands

Looking for a simple backup tool (no sophisticated client-server solution for now) I stumbled upon backupninja. From its package description I learnt:

Backupninja lets you drop simple config files in /etc/backup.d to
coordinate system backups. Backupninja is a master of many arts,
including incremental remote filesystem backup, MySQL backup, and ldap
backup.