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Re: From dual- to single-boot

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Le 24/07/2017 à 16:13, solitone a écrit :
> I never use MacOs, so I want to just keep debian, so at least I'll put its 22
> GB space to better use. I used to keep it just for some sporadic firmware
> update, but frankly I don't think I'll need this again in the future.
> 
> ~$ sudo /sbin/parted /dev/sda print
> Model: ATA APPLE SSD SM0128 (scsi)
> Disk /dev/sda: 121GB
> Sector size (logical/physical): 512B/4096B
> Partition Table: gpt
> Disk Flags:
> 
> Number  Start   End     Size    File system     Name                  Flags
>   1      20.5kB  210MB   210MB   fat32           EFI System Partition  boot,
> esp
>   2      210MB   22.6GB  22.4GB  hfs+
>   3      22.6GB  23.2GB  650MB   hfs+
>   4      23.2GB  31.2GB  8000MB  linux-swap(v1)  swap
>   5      31.4GB  121GB   89.8GB  ext4            linux
> 
> I would use parted from the installation media to delete partitions 1-4,
> recreate the swap at the start (unless I decide to usa a file for the swap),
> and move/extend the ext4 partition.

AFAIK, parted (the command line program) cannot move the start of a 
partition and its contents. Only gparted (the GUI program) can.

With LVM you could have just created a new partition, use it as a 
physical volume (PV) to extend the volume group (VG) and use the new 
available space to extend or create logical volumes (LV).

With btrfs instead of ext4, you could have used a new partition to 
extend the existing filesystem.

> This seems a bit risky, though. I already asked this, but is there a way to
> completely backup my current system, so that I could quickly restore it on a
> blank new partition, in case everything goes wrong?

There are two main ways :
- create an image of the partition with dd, partclone, partimage, 
clonezilla... (it must not be mounted read/write)
- back up the filesystem contents with cp -a, rsync...

The image has the advantage of saving the filesystem metadata (UUID, 
LABEL...)

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From dual- to single-boot solitone <solitone@mail.com> - 2017-07-24 16:20 +0200
  Re: From dual- to single-boot Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-07-24 21:10 +0200
    Re: From dual- to single-boot solitone <solitone@mail.com> - 2017-07-25 07:20 +0200
      Re: From dual- to single-boot Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-07-25 19:50 +0200
  Re: From dual- to single-boot Felix Miata <mrmazda@earthlink.net> - 2017-07-24 21:50 +0200
  Re: From dual- to single-boot Joel Rees <joel.rees@gmail.com> - 2017-07-25 07:30 +0200
    Re: From dual- to single-boot solitone <solitone@mail.com> - 2017-07-25 07:50 +0200
      Re: From dual- to single-boot Joel Rees <joel.rees@gmail.com> - 2017-07-26 00:00 +0200

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