On Thu, 27 Jul 2023 18:47:50 +0200
KarlderLetzte <karlderlet...@holnishaus.de> wrote:

> Am Donnerstag, dem 27.07.2023 um 08:27 -0700 schrieb stan via users:
> > On Wed, 26 Jul 2023 19:21:50 +0200
> > KarlderLetzte <karlderlet...@holnishaus.de> wrote:
> >   
> > > hello everybody,
> > > 
> > > i need some space on disk for a second installation.
> > > therefore i want to safely shrink my fedora installation.
> > > 
> > > here is the disk layout:  
> > 
> > [snip]
> >   
> > > i tried it with gparted, but if i want to shrink, a warning
> > > appears,
> > > that it is possible,to not boot anymore.
> > > 
> > > my question:
> > > is there a safe way to shrink?  
> > 
> > I don't know that I would even be able to help, since I use fixed
> > ext4
> > partitions for the same purpose, but I think the output of df would
> > give a better idea of your system layout and partition sizes and
> > usage
> > in case there is someone who *can* help.  
> 
> here is the output of df and btrfs filesystem.
> i resized the filesystem to a desired value.
> my ssd has 500GB capacity.
> it is the nvme0n1..6
> 
> sudo btrfs filesystem sync /
> sudo btrfs filesystem df /
> Data, single: total=195.01GiB, used=154.75GiB
> System, single: total=4.00MiB, used=48.00KiB
> Metadata, single: total=5.01GiB, used=2.21GiB
> GlobalReserve, single: total=301.27MiB, used=0.00B
> 
> df
> Dateisystem    1K-Blöcke   Benutzt Verfügbar Verw% Eingehängt auf
> devtmpfs            4096         0      4096    0% /dev
> tmpfs            7850952         0   7850952    0% /dev/shm
> tmpfs            3140384      1964   3138420    1% /run
> /dev/nvme0n1p6 282561536 164889684 115040620   59% /
> /dev/nvme0n1p6 282561536 164889684 115040620   59% /home
> tmpfs            7850952        12   7850940    1% /tmp
> /dev/nvme0n1p5    996780    355908    572060   39% /boot
> /dev/nvme0n1p4    613184     17796    595388    3% /boot/efi
> tmpfs            1570188       192   1569996    1% /run/user/1000
> /dev/sda1         495312      5920    412352    2%
> /run/media/held/40f020fb-33eb-406b-a3b0-7f7ba297557b

No one is stepping forward, but this looks fairly straightforward, since
there is unused space; I think the commands in man btrfs-filesystem
and man btrfs-subvolume are what you want, but I am not qualified to
tell you how to use them.  It seems there aren't any btrfs experts on
this list.  Maybe try discourse, the web forum?  Or a web search might
turn up a recipe, since this has to be a common request.

 
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