terminal command for sd card size

[dukla2000]

I'm looking for the same thing.

I have no computer, replaced it with a smartphone over a decade ago, even then it was Win95,98,XP followed by about six months of Ubuntu and thanks to Synaptic Package Manager, I only used the terminal maybe half a dozen times. A record I beat with the Pinephone simply by turning it off ($ sudo poweroff) as I can't find any other way.

I thought I found the solution with parted ($ sudo parted)  I think it came preinstalled, unless it was installed as a dependency by something else I installed. I'm assuming these operations need administrator privileges.
In parted I tried the print command which revealed partition 2 was what I probably wanted to resize.
Then I used the resizepart command and then entered 2.

It then prompted me for an end size, with the current size in brackets, something like [1120MB] I entered 14GB
Then I entered the print command again, which revealed the resized partition.

I tried again, but entered 200GB (it's a 256GB sdcard) which failed. Disk /dev/mmcblk2 evidently is the 16GB emmc storage.

I assume the command: select /dev/mmcblk? would get me on the right track, what is the microsdcard labelled as in postmarketos on a Pinephone?

IIRC the SDcard is /dev/mmcblk0 - try lsblk command which will show what you have.

In parted 100% as the end sector should fill the disk.

Overall trying to re-size the disk you (or more particularly I think pnphn) are running from is way beyond my skills as I think you need to have it unmounted during the resize, which is tricky if it is your root partition. Although, Linux being what it is, I think in fact it can be done with some extreme sleight of hand. Of course booting from SDcard and installing to eMMC and then re-sizing eMMC before you boot from it is fine.