This is a small tip, but a useful one also, to list only the directories in Linux use this command.

ls -d ./*/

That will have an output like this

./ConsoleKit/       ./bash_completion.d/  ./cron.daily/    ./default/   ./gnome-vfs-2.0/  ./iptables/      ./logrotate.d/   ./nginx/     ./php/       ./profile.d/  ./skel/   ./vbox/
./ODBCDataSources/  ./bluetooth/          ./cron.hourly/   ./fail2ban/  

There are other ways, if you want it in a single column, use this ones: <p class="codigo">ls -l | awk ‘ /^d/ {print $9}’</p>

You will get something like this:

ConsoleKit
ODBCDataSources
PolicyKit
X11
alsa
avahi
bash_completion.d
bluetooth
bonobo-activation
ca-certificates
conf.d
cron.d
cron.daily
cron.hourly
cron.monthly
cron.weekly
cups
dbus-1
default
fail2ban

To list only files use this:

ls -l | grep -v /

Without the -v to get only directories.

From the man page, we have:

       -F, --classify
              append indicator (one of */=>@|) to entries

So you can also use this:

ls -F | grep /

For directories and: <p class="codigo">ls -F | grep -v /</p> For files <p class="codigo">ls -F | grep @</p> For symbolic links

And so on, that one is one of my favorites, which is yours?