PWSCF 
sample 
 &CONTROL
       calculation = 'scf',
      restart_mode = 'from_scratch' ,
         verbosity = 'default',
 /
 &SYSTEM
             ibrav = 1,
         celldm(1) =   10.0000000000,
               nat = 2,
              ntyp = 2,
           ecutwfc =   30.0000000000,
 /
 &ELECTRONS
 /

ATOMIC_SPECIES
  O    1.00000 OUSPBE.RRKJ3 
 Ag    1.00000 AgUSPBE.RRKJ3 
ATOMIC_POSITIONS alat 
  O    0.000000000    0.000000000    0.000000000 0 0 0 
 Ag    1.000000000    1.000000000    1.000000000 0 0 0 
K_POINTS tpiba 
2 
   0.000000000    0.000000000    0.000000000    0.500000000 
   0.500000000    0.500000000    0.500000000    0.500000000