Install tree command on Linux / Unix / Ubuntu

If you are using Debian/Ubuntu, Mint Linux
Type following command in your terminal:

$ sudo apt-get install tree -y

Tree Command Usages

1. By default, if no argument is provided to tree command, it prints tree of current directory.

usr_name:Deep-learning-for-sentiment-analysis admin$ tree

2. To see only directories:

$ tree -d

3. Limit the level or depth of recursion:

$ tree -L 2

4.  Show all files including hidden dot files:

$ tree -a  -L 2