Steps to create a permanent Bash alias:

bash_aliases.txt

Open the Terminal app

1.Edit ~/.bash_aliases or ~/.bashrc file using: sudo nano ~/.bash_aliases
2.Append your bash alias
  For example append: alias update='sudo yum update'
3.Save and close the file.
4.Activate alias by typing: source ~/.bash_aliases




Please note that ~/.bash_aliases file only works if the following line presents in the ~/.bashrc file:

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