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Resize root partition in Debian VM (piefed.social)

submitted 1 month ago by marighost@piefed.social to c/linuxquestions@lemmy.zip

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Hello Linux friends,

Looking for some help today. Some dummy who won't be named undersized the partition for his Debian VM at 32Gb. This was not enough space, as the VM is already out of storage. In Proxmox where the VM is hosted, I've already allocated extra space for this VM using Proxmox's built in GUI tools. The problem is, I'm not sure how to properly extend the partition within the VM itself, using the terminal only, without breaking everything (something I obviously don't want to do, lol).

I've done a bit of searching and people seem to be recommending tools like fdisk and resize2fs, both of which are not installed, and I'm afraid that I don't have any available space to install them. I'm also a bit of a noob and some of the language for drives and partitioning just flies over my head.

Any tips on:

Clearing a bit of space on a Debian VM (that's mostly using Docker, no other programs/files running constantly)
Resizing root partitions without too much headache
Would be greatly appreciated!

Thanks, and have a beautiful and safe day!

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[–] fuckwit_mcbumcrumble@lemmy.dbzer0.com 8 points 1 month ago (1 children)

Boot a gparted iso and resize it from there. Trying to do it command line only, without installing anything is just going to be suffering.

[–] marighost@piefed.social 2 points 1 month ago (1 children)

Here it is, the dumb question: How can I boot from an iso to modify a VM's partitions? Further, would the VM's / dir need to be unmounted first to resize it? Thanks for the guidance.

[–] fuckwit_mcbumcrumble@lemmy.dbzer0.com 1 points 1 month ago

Just configure your VM to boot the gparted iso. What virtulization software are you using? If it's proxmox on your VM there's the options on the side bar, then boot order. Just untick the main boot drive and only have the CD drive bootable until you're done resizing.

When you reboot nothing is mounted because it's off. Boot gparted and it will handle everything.