I've a request from a school which have computers for teachers and some for students. For each group I've a specific account (teacher & student). the school wouldn't like that the 'student' account can log in on teachers' computers. I don't know if there's a way to do that.
Creating local accounts on the computers is not acceptable for the school (because of maintenance).
thanks to all for your help
I probably didn't understand very well the complete behaviour of a hardlink because I found a post where it is said (as Dave said) that :
"Most of the time when I hear full backups and incremental backup people mean:
Full: Backup all the data.
Incremental: Backup only the changes.
If you need to restore a backup then you start with the full backup and then all the incrementals. That can take a lot of time. This is one reason why many corporations do full backups in the weekend and partial ones during weekdays. Up to five partials is manageable.
Now rsync usually does not make partial backups. If sends only the changes over the net, but the end result is a full copy of all the data. Thus the most used reason for to not use only partials does not apply."
Does that mean that the file is stored once and till all hardlinks are not deleted, the file will be there, even if the first full backup is deleted ?
I agree with you, I can't keep incrementing forever ; that's why I'd like to be able, once a week, to 'merge' the last full backup and the incremental ones to make a new 'full' backup. According to the hardlink function, I found that post which seems interesting : (http://speakmy.name/2014/01/12/automatic-backups-with-ruby-and-linux-shell-part-3/)
As the amount of data I've to backup is about 900GB, I can't send that through internet every week !
@Tony : I'll check that part of having at both site a passphrase, thanks
ok, so if I understand right, I should do that ?
1st backup (COS --> Sinology Folder #1) : full backup without hardlink
2nd backup : Sinology folder #1 --> Sinology folder #2 with ardlink
Cos --> Sinology #2 with hardlink & delete
3rd backup : Sinology folder #2 --> Sinology folder #3 with ardlink
Cos --> Sinology #3 with hardlink & delete
and so ...
I saw a post with rsync over ssh without password. I've to create certificates on both sides and exchange them. I'll try this way because if it works, I'll try to backup different COS systems
But I need first to understand
Thanks very much for the informations Yes, i just realized that I can't install backuppc on the DSM I just rent in the cloud ; so I'm going to make my backups using rsync over ssh. I'll check the link you sent and try to make different rsync with crontab
Thanks very much
Thanks so much, I'll try that
I thought running the rsync from the remote backuppc system on the synology. But now, I wonder if it's very usefull... maybe a single script would be enough. The only problem thing is that I wouldn't like to make a full backup every week because it will take a too long time. So I was wondering if Backuppc is able to 'make' a new full backup with the one from the week before plus the incremental ones of the week. (I dont know if what I said is clear... )
Thanks very very much
I just rent a sinology to an external copy of my data . The idea is to install on it a backuppc server and the connect to my local system to retrieve datas. For that, I'd like to connect using rsync over ssh. But do to that, I need to open my port 22 on my firewall and I'm not very enthusiastic with that. So, I'd like to open it but only for a specific IP adress (the public one of my sinology). Is there a way to do that ?
And, second question, would it be better to open another port that the 22 and the make a redirection to my ssh server ?
thanks to all for your help