#Punto 1
ls -l | grep '^-'
ls -l | grep '^-' | sort -r
ls -l | grep '^d'

ls -lR | grep '^-' > misdir
ls -l | grep '^-' >> misdir; ls -l | grep '^-' | sort -r >> misdir; ls -l | grep '^d' >> misdir
wc misdir >> misdir; who >> misdir; date >> misdir