Alias in Linux

echo "alias master='ssh christopher@master'" >> ~/.bashrc && \
echo "alias node1='ssh christopher@node1'" >> ~/.bashrc && \
echo "alias node2='ssh christopher@node2'" >> ~/.bashrc && \
echo "alias node3='ssh christopher@node3'" >> ~/.bashrc && \
echo "alias node4='ssh christopher@node4'" >> ~/.bashrc && \
echo "alias node5='ssh christopher@node5'" >> ~/.bashrc && \
echo "alias node6='ssh christopher@node6'" >> ~/.bashrc && \
echo "alias raspberry='ssh christopher@raspberrypi'" >> ~/.bashrc

Update

echo "alias magic='sudo apt update && sudo apt -y upgrade && sudo apt -y autoremove && sudo reboot -h now'" >> ~/.bashrc && \
. ~/.bashrc