code: def update_apt(days=3, upgrade=False):
      
      # Check the apt-get update timestamp (works on Ubuntu only)
      with settings(warn_only=True):
          last_update = run(
              "stat -c %Y /var/lib/apt/periodic/update-success-stamp")
      if ('cannot stat' in last_update
              or (time.time() - float(last_update)) > days * 86400):
          sudo("apt-get --yes update")
          if upgrade:
              sudo("apt-get --yes upgrade")
docs: Update apt index if not update in last N days