A: You should have a basic understanding of quantum mechanics (the concept of wavefunctions, eigenvalues, and the Schrödinger equation), familiarity with solid‑state physics concepts (crystal lattices, Brillouin zone, reciprocal space, bands), and comfort with using the Linux command line (navigating directories, editing text files, running executables). Most good PDF courses will briefly recap the essential physics and provide command‑line instructions.
This is widely regarded as the best, step-by-step guide for beginners. Quantum Espresso Course For Solid-state Physics Pdf