ROOT

[ryo]

I cannot log in to root using "su".
I have a dock for the PinePhone bought for $ 199.
Yes, I have keyboard to attach to the dock.

For some reason, I totally forgot why I asked these questions. （汗）
I know I did so to check if it can be repaired without having to re-install the OS, but well, I still can't remember.

I downloaded the file

   Manjaro-ARM-xfce-pine64-lts-21.12.img.xz

But I don't know how to flashing it to my PinePhone.

I don't have an SD card.

You'll need to get an SD card then, just an 8 GB one is enough, and they're very cheap these days.
Although 32 GB is recommended for the lazy ones (because you'll need to resize the partition after installation, which is unnecessary with a 32 GB SD card).
Also, don't install with the file you downloaded, that one isn't for PinePhone.

You can also skip on the partition resize step by installing Mobian because that one comes with an installation GUI, which as a bonus gives you the option for disk encryption.
For the rest of the instruction manual: https://wiki.pine64.org/index.php/PinePh...structions

This guide seems very unhelpful if you do it for the first time (I thought like that too, and I'm using Linux for almost my entire life), but if you follow it closely, you'll see pretty quick that it's actually very easy.
And a bit of distro hopping later, you'll know how to do it by memory.