(MacOS Mojave Example)

1. Go to your home directory:

   $ cd $HOME

2. Then open the hidden .bash_profile file in the vi editor:

   $ vim .bash_profile

3. Jump to the last character of the file by pressing capital G and then $

4. Press I to be able to insert text in the vi editor

5. insert your new alias like:

   $ alias ll='ls -lG'

6. press control + c to quit insert mode of vi

7. type following to write and quite your new changes:

   $ :wq

8. restart your terminal

9. reopen terminal and you should be able to use the alias ll

(MacOS Mojave Example)

1. Open the hidden .bash_profile file in the Vim editor:

    vim ~/.bash_profile 

2. Jump to the last character of the file by pressing capital G and then $.

3. Press o to add a new line to the file.

4. Insert your new alias like:

    alias ll='ls -lG' 

5. Press Esc to exit insert mode of Vim.

6. Type following to write your new changes and exit the editor:

    :wq 

7. Reopen terminal and you should be able to use the alias ll