Electronic Band Structure for Beginners using quantum espresso. 

####(scf)
&control
calculation ='scf',
prefix='si'
pseudo_dir='/home/dr/all_pbe_UPF_v1.5/',
outdir='./',
/
&system
ibrav=2,
celldm(1)=celldm(1)=10.3337,
nat=2, ntyp=1,
ecutwfc= 40,
occupations='smearing', smearing='mv', degauss=0.02
/
&electrons
mixing_beta = 0.7
diagonalization='david'
/
ATOMIC_SPECIES
Si 28.0855 si_pbe_v1.uspp.F.UPF
ATOMIC_POSITIONS
Si 0.000 0.000 0.000
Si 0.250 0.250 0.250
K_POINTS (automatic)
10 10 10 0 0 0
####### (band)
&control
calculation ='bands',
prefix='si'
pseudo_dir='/home/dr/all_pbe_UPF_v1.5/',
outdir='./',
/
&system
ibrav=2,
celldm(1)=celldm(1)=10.3337,
nat=2, ntyp=1,
ecutwfc= 40, nbnd= 40
occupations='smearing', smearing='mv', degauss=0.02
/
&electrons
mixing_beta = 0.7
diagonalization='david'
/
ATOMIC_SPECIES
Si 28.0855 si_pbe_v1.uspp.F.UPF
ATOMIC_POSITIONS
Si 0.000 0.000 0.000
Si 0.250 0.250 0.250
K_POINTS (crystal_b)
6
0.000 0.000 0.000 10 !G
0.500 0.000 0.500 10 !X
0.500 0.250 0.750 10 !W
0.375 0.375 0.750 10 !K
0.000 0.000 0.000 10 !G
0.500 0.500 0.500 1 !L
#######(bands)
&BANDS
prefix='si'
outdir='./'
filband='si.bands'
lsym=.true.
/
EOF
##########(plotband)
si.bands
-20 21
si.xmgr
si.ps
6.0387
5 6.0387