Create Alias Command in Ubuntu

Ubuntu Alias Command

1. Create a file called .bash_aliases using your favorite text editor.
    gedit .bash_aliases

2. Write the alias you want to create, e.g:
    alias update='sudo apt-get update'

3. Save the file and reconfigure your bashrc.
    . ~/.bashrc

4. Check if your alias is added correctly.
    alias

5. Now you can start to use your alias command. Yay! 
    update #alias for 'sudo apt-get update'
    
*note: You cannot use space for alias name for separator, use dash (-) instead.
    wrong alias name : alias open document='cd; cd Documents'
    correct alias name : alias open-documents='cd; cd Documents'