Assuming you are using Bash, create a .bash_aliases file in your users home directory, if it already doesn’t exist:

touch ~/.bash_aliases

Open up your .bash_aliases :

vi ~/.bash_aliases

Then, add a lines with the following to the file:

~/.bash_aliases

alias apt='sudo apt-get'
alias update='sudo apt-get update && sudo apt-get upgrade && sudo apt-get autoremove && sudo apt-get autoclean'

To apply the changes immediately to your bash profile without having to log out, simply run this:

. ~/.bashrc

or

. ~/.bash_profile