List only directories/files in Linux

If only list directories:

ls -d */

you can also use:

ls -l | grep ^d

or

tree -d -L 1

or

echo */  

list the hide directory with

ls -d .*/

if only list the files, use:

ls -l | grep ^-
ls -l | grep -v ^d

if only list hidden files, use:

ls -a | grep ^'\.'

create alias by adding following lines to .bash_profile

alias lsd="ls -d */"
alias lsf="ls -l | grep -v ^d"