ahh
I see where your issue lies.
you can't type ./bash_alias at the cli, bash will always want to execute the commands, not create the aliases. you can include the bash_alias file into the .bashrc or into the global /etc/bashrc
including them in one of the .bashrc files is the only way to have the aliases remade with every terminal opened / reboot.
What I do instead is actually create links with ln. those are permanent so only have to do it once.
the links do need to be made with root privs to have write access to /bin, /sbin, /usr/bin or /usr/sbin.
The failure of links is the "sudo apt-get update" functionality used in the alias example isn't available.
