possible simplification of editing shell files during the setup procedure

[TiagoFerrao]

Step 3.2 and similar where it is required to edit a file by adding a new line, instead of a two step procedure like
(nano ~/.zshrc ) + add the line "alias ibrew="arch -x86_64 /usr/local/bin/brew""

the same can be done in a single line on terminal :
echo 'alias ibrew="arch -x86_64 /usr/local/bin/brew"' >> ~/.zshrc