Re: [gentoo-user] resizing and moving home directory to new partition on save drive

[thelma@sys-concept.com]

On 1/10/21 6:57 PM, Wols Lists wrote:
> On 11/01/21 00:31, thelma@sys-concept.com wrote:
>> On 1/10/21 3:46 PM, antlists wrote:
>>> On 10/01/2021 21:42, thelma@sys-concept.com wrote:
>>>> I want to move /home directory to a new partition (save drive).
>>>>
>>>> I have 1-SSD drive:
>>>> Filesystem      Size  Used Avail Use%
>>>> /dev/sda4       916G  405G  464G  47% /
>>>>
>>>>
>>>> Home directory is on it taking about 360GB
>>>>
>>>> I was planning doing it in stages.
>>>>
>>>> Stage-1
>>>> Using Gparted to resize "/" portion shirk it to about 450GB
>>>> create new ext4 partition  for /home /dev/sda5
>>>>
>>>> Boot-strap the PC with live-gentoo
>>>> mv /home /home.org
>>>> mkdir /home
>>>> mount ext4 /dev/sda5 /home/
>>>>
>>>> cp -rp /home.org/*  /home/
>>>>
>>>> edit fstab:
>>>> /dev/sda5    /home    ext4    default  0  0
>>>> reboot and test home
>>>>
>>>> Am I missing something?
>>>
>>> Couple of things.
>>>
>>> Firstly, why use a gentoo live disk? Just log in as root.
>>>
>>> Secondly, why rename home? Just mount sda5 on /mnt to do the move, then add it to fstab to mount on /home.
>>>
>>> And a little bit you might have missed - DON'T put root's home on a mounted disk - if it's currently in /home, move it to /. Don't forget to edit /etc/passwd if you have to move it.
>>
>> Can you elaborate pls.?
>> My current "home" is in "/"; so why move it there, it is already there.  
>> I don't have extra disk around, but I could copy /home over network to another PC.
> 
> Are you logging in as root?! THAT'S DANGEROUS!
> 
> Probably not, you are probably misunderstanding me.
> 
> I've just checked, on my system, root's home is /root, which is as it
> should be. Is your home /home/username, or is it /username? You make it
> sound like it's /username, which I don't think is what you mean ...
>>
>> I was planning to move "home" to another partition as I plan to wipe old installation (it is impossible for me to upgrade); it will be easier to reinstall.
>> My old installation is: 
>> Portage 2.3.24 (python 3.5.4-final-0, default/linux/amd64/17.0/desktop, gcc-6.4.0, glibc-2.25-r10, 4.9.72-gentoo x86_64)
>>
>> Since, old installation has home or "/" (root) partition, if I wipe the root, home will be gone as well.  So I was planning on moving "home" to another partition, this way all data will be there.
>> So, after moving "home" to another partition "sda5" I can wipe the "sda4" and re-install gentoo.  "home" data would not be touched by upgrade. 
>>
>>
> Ahh ... you didn't say that! That changes everything!
> 
> Okay. I would look to free about 380GB (just enough) at the end of the
> disk to create sda5 which will be (at least temporarily) your new /home.
> LOGGED IN AS ROOT just mount that on /mnt, and copy the contents of
> /home into it.
> 
> Now using your gentoo install disk delete sda4 and split it into two -
> your new sda4 for your new gentoo, and a new sda5 (AT LEAST as big as
> one you created in the last step), which will shunt the partition you
> just created into sda6. Install your new gentoo.
> 
> Now you've got sda4 (/), sda5 (which will be /home), and sda6 (where
> you've just copied your old /home). Mount sda6 on /mnt again, and copy
> it to /home (sda5).
> 
> Finally, delete sda6, extend sda5 to use the space you've just freed,
> and expand the filesystem on /home to use the full size of the extended
> partition.
> 
> That'll probably leave you with a 150GB /root, but that'll be plenty I
> expect (and a 760GB /home).
> 
> Cheers,
> Wol
> 

Thank you, that will work too!