How to make Alias

Dear all,

I'm new in unix systm , I try to write alias script:

alias hr= cd/home/hmi/bin/Log

and this work,
but when i quit from unix and login again, this can't work again.
how to create alias that can work anytime

thank you

Regards

Heru

Add it to a shell initialisation file that is read for all shells..... say ~/.bashrc for bash.

Cheers
ZB