How to create a permanent “alias” for ubuntu? [duplicate]

Question

If you create an alias for example:

alias cls="clear"

It exists untill you kill terminall session. When you start a new terminal window the alias doesn't exist any more. How to create "permanent" alias, one that exists in every terminal session?

Answer 1

You can put such aliases in the ~/.bash_aliases file.

That file is loaded by ~/.bashrc. On Ubuntu 10.04, the following lines need to be uncommented to enable the use of ~/.bash_aliases. On Ubuntu 11.04 and later, it's already enabled:

if [ -f ~/.bash_aliases ]; then
    . ~/.bash_aliases
fi

also

You can add the function below to your .bashrc file.

function permalias ()

{ 
  alias "$*";
  echo alias "$*" >> ~/.bash_aliases
}

Then open a new terminal or run source ~/.bashrc in your current terminal. You can now create permanent aliases by using the permalias command, for example permalias cls=clear.