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Re: backing up backups

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On 4/13/22 20:03, Default User wrote:
> On Wed, Apr 13, 2022 at 4:42 PM David Christensen wrote:

>> As you find system administration commands that work, put them into
>> scripts:
>>
>> #!/bin/sh
>> sudo rsync -aAXHxvv --delete --info=progress2,stats2,name2
>> /media/default/MSD1/ /media/default/MSD2/
>>
>>
>> Use a version control system for system administration.  Create a
>> project for every machine.  Check in system configuration files,
>> scripts, partition table backups, encryption header backups, RAID header
>> backups, etc..  Maintain a plain text log file with notes of what you
>> did (e.g. console sessions), when, and why.
>>
>>
>> Put your OS on a small, fast device (e.g. SSD) and put your data on an
>> array of large devices (e.g. ZFS pool with one or more HDD mirrors).
>> Backup both as before.  Additionally, take images of your OS device.

> Yikes!
> 
> David, I really think I am too old to learn all of that.  But maybe I can
> learn at least some of it, over time.  Please understand that I am not
> training to be a real system administrator, except that I guess anyone is
> (or should be able to be) actually the "system administrator" of their own
> computer(s).
> 
> Anyway, thanks for the advice.


I learned the above tools because they save time, save effort, and 
provide features I want.


I use dd(1) and an external HDD for images.  You will want to write 
scripts (like the simple example I previously showed).


CVS has more than enough power for a single user/ system administrator, 
and is simpler than Git.  Here are the common use-cases:

1.  Install CVS (and SSH) on Debian:

     # apt-get install cvs openssh-client openssh-server

2.  Create a CVS repository:

     # mkdir -p /var/local/cvs/dpchrist
     # cvs -d /var/local/cvs/dpchrist init
     # chown -R dpchrist:dpchrist /var/local/cvs/dpchrist

3.  Add CVS client environment variables to your shell (adjust host and 
username as required):

     export 
CVSROOT=dpchrist@cvs.tracy.holgerdanske.com:/var/local/cvs/dpchrist
     export CVS_RSH=ssh

4.  Create a project:

     $ mkdir -p import/myproject
     $ cd import/myproject
     $ touch .exists
     $ cvs import myproject dpchrist start

5.  Check-out a working directory of a project from the repository:

     $ cd
     $ cvs co myproject

6.  Add a file to the project working directory meta-data:

     $ cd myproject
     $ vi myfile
     $ cvs add myfile

7.  See changes in the working directory compared to the repository:

     $ cvs diff

8.  Bring in changes made elsewhere and checked-in to the repository:

     $ cvs update

9.  Check-in working directory to the repository:

     $ cvs ci

10. Remove a file from the project:

     $ rm myfile
     $ cvs rm myfile


See the GNU CVS manual for more information:

 
https://www.gnu.org/software/trans-coord/manual/cvs/html_node/index.html


ZFS is a new way of doing storage with disks, arrays, volumes, 
filesystems, etc., including backup/ restore (snapshots and 
replication).  The learning curve is non-trivial.  The Lucas book gave 
me enough confidence to go for it:

     https://mwl.io/nonfiction/os#fmzfs


David

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Thread

backing up backups Default User <hunguponcontent@gmail.com> - 2022-04-11 05:00 +0200
  Re: backing up backups David <bouncingcats@gmail.com> - 2022-04-11 05:20 +0200
    Re: backing up backups Default User <hunguponcontent@gmail.com> - 2022-04-11 06:00 +0200
  Re: backing up backups David Christensen <dpchrist@holgerdanske.com> - 2022-04-11 06:50 +0200
    Re: backing up backups <tomas@tuxteam.de> - 2022-04-11 07:20 +0200
      Re: backing up backups David Christensen <dpchrist@holgerdanske.com> - 2022-04-11 18:10 +0200
        Re: backing up backups Default User <hunguponcontent@gmail.com> - 2022-04-13 18:30 +0200
          Re: backing up backups David Christensen <dpchrist@holgerdanske.com> - 2022-04-13 22:50 +0200
            Re: backing up backups Default User <hunguponcontent@gmail.com> - 2022-04-14 05:10 +0200
              Re: backing up backups David Christensen <dpchrist@holgerdanske.com> - 2022-04-14 09:30 +0200
                Re: backing up backups Default User <hunguponcontent@gmail.com> - 2022-04-18 22:10 +0200
                Re: backing up backups David Christensen <dpchrist@holgerdanske.com> - 2022-04-19 00:50 +0200
                Re: backing up backups David Wright <deblis@lionunicorn.co.uk> - 2022-04-21 23:00 +0200
  Re: backing up backups Keith Bainbridge <keithrboz@gmail.com> - 2022-04-19 06:00 +0200
  Re: backing up backups David Wright <deblis@lionunicorn.co.uk> - 2022-04-19 18:10 +0200

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