In Debian Jessie, this works nice:
ls -lah --group-directories-first
# l=use a long listing format
# a=do not ignore entries starting with .
# h=human readable
# --group-directories-first=(obvious)
# Note: add -r for reverse alpha
# You might consider using lh by appending to ~/.bashrc as the alias:
~$ echo "alias lh='ls -lah --group-directories-first'" >>~/.bashrc
# -- restart your terminal before using lh command --