[nflug] backups on an nfs server ..on and on

[eric]

doing a tiny bit of searching brought me to here:

The parameter to -g is not the backup itself, but a snapshot file that
stores information about the previous tar dump.  It needs to have been
created by that previous backup.  For example, you could do something
like the following to get a daily incremental backup:

tar -cjf backup'+%Y%m%d'.tar.bz2 -g daily-snapshot-file /etc /usr/local/etc


Is a "snapshot or incremental" simply a captured difference from the directory and tarball file.

I read the man pages again but I don't speak their language that well yet.

Thank you again,
Eric



eric wrote:

>Cool, my server works great and it's really easy to recover files
>....then I discover that my home dir is 60 gb and my network server has
>only 170 gb of space, definitly not enough room for a mon-fri bkup.
>
>Isn't their a way (through tar) to delta files like in SCCS? Is it
>called increment?
>
>Thanks,
>Eric
>
>
>Robert Meyer wrote:
>
>  
>
>>SSH security done with keys is dependant on keeping the private key secure.  I
>>use ssh keys for some things.  The private key goes in your $HOME/.ssh
>>directory.  Your home directory cannot be writable by anyone than yourself and
>>the .ssh directory must be mode 700 (rwx------).  You wouldn't use
>>public/private keys in an environment where you cannot guarantee the security
>>of the private key, even with a password on it.
>>
>>The use for unpassworded keys is typically in an aggregate envronment where you
>>would be trying to use SSH and SCP to handle a group of machines as a single
>>entity.
>>
>>Again, not a good idea unless you're sure the private keys can be safeguarded.
>>
>>BTW, the private key is on the machine initiating the connection and the public
>>key is in the "authorized_keys" file on the remote machine (the recipient).
>>
>>Hope this helps...
>>
>>Cheers!
>>
>>Bob
>>
>>--- eric <eric at bootz.us> wrote:
>>
>> 
>>
>>    
>>
>>>This doesn't sound good?  Is it because only I know what the key is and
>>>that is sort of like a password to sshd?
>>>
>>>*** IMPORTANT **
>>>do NOT enter a password/passphrase if you want uninterupted login's
>>>*** IMPORTANT **
>>>
>>>
>>>
>>>Darin Perusich wrote:
>>>
>>>>from one of my cheat sheets...
>>>   
>>>
>>>      
>>>
>>>>--------------------------
>>>>ssh login with NO password
>>>>--------------------------
>>>>
>>>>to access/logon a system using ssh without being prompted for a password
>>>>we need to generate ssh keys as that user, see SSH-KEYGEN(1) for
>>>>detailed info.
>>>>
>>>>log into the systems you wish to access with entering a password.
>>>>generate ssh keys. there are differect types of key's that can be
>>>>generated, if the systems is using ssh protocol 1 or 2 there will be
>>>>different keys. you can also employ different type a keys for the
>>>>differenc protocol versions, des, rsa, etc. see the man page for a
>>>>breakdown.
>>>>
>>>>      system1:> ssh-keygen -t rsa  (ssh protocol version 2)
>>>>
>>>>*** IMPORTANT **
>>>>do NOT enter a password/passphrase if you want uninterupted login's
>>>>*** IMPORTANT **
>>>>
>>>>this will create multiply files, id_rsa and id_rsa.pub for version 2,
>>>>and identity and identity.pub for version 1. on the remote system in the
>>>>users .ssh folder create an authorized_keys2 and copy the contents of
>>>>id_rsa.pub into it for protocol version 2, authorized_keys gets the
>>>>contents of identity.pub for protocol version 1.
>>>>
>>>>test by ssh'ing to the remote system.
>>>>
>>>>
>>>>eric wrote:
>>>>
>>>>
>>>>     
>>>>
>>>>        
>>>>
>>>>>is it proper to automate a ssh login?
>>>>>
>>>>>
>>>>>  
>>>>>
>>>>>       
>>>>>
>>>>>          
>>>>>
>>>>     
>>>>
>>>>        
>>>>
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>>>   
>>>
>>>      
>>>
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>>    
>>
>
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