Can't create transaction lock

Maybe this is working as intended as a read-only file system, but how else would I install VS code?

I do:
sudo rpm is --import https://packages.microsoft.com/keys/microsoft.asc
Then error:
error: can't create transaction lock on /usr/share/rpm/.rpm.lock (Read-only file system)

Can't create transaction lock on /usr/share/rpm/.rpm.lock (read-only file system)