Is customizing default-mgmt-dvm xterm safe?

I use many minimal VMs that don’t have a terminal emulator. So I use qvm-console-dvm to use them, which spawns a terminal of a disp based on default-mgmt-dvm.

The problem is that the terminal that spawns is a white-background very-very-small-font terminal, and it’s xterm. I know how to customize xterm: It’s by adding those lines in /home/user/.Xresources:

xterm*faceName: Monospace
xterm*faceSize: 20
xterm*background: black
xterm*foreground: white

I was wondering about the security risk(s) of doing such thing.

Also, please suggest the more secure command (if that’s a thing,) for example using echo "text" >> .Xresources or cat << EOF | tee .Xresources or nano or vim, or something I haven’t mentioned. When said the more secure command, then only say its security risks; you don’t have to say the security risks of others that we’ll not use anyway.

Doing that won’t have any security implications, why would it?

Also, please suggest the more secure command (if that’s a thing,) for example using echo "text" >> .Xresources or cat << EOF | tee .Xresources or nano or vim, or something I haven’t mentioned.

You could edit the config file in another qube and qvm-copy it to your default-mgmt-dvm.

Generally, I think it is not necessary to even have an xterm installed. You can use qvm-console-dispvm. See NOTE below.

When said the more secure command, then only say its security risks; you don’t have to say the security risks of others that we’ll not use anyway.

I have asked a few things about that special qube in the past, as I was/am willing to use a minimal template for it (NOTE: but have not explored further since then, due to lack of free time). In case you are interested:

Doing that won’t have any security implications, why would it?

Perhaps a font file (which “Monospace” would translate to) could be bad.