Q: how do u make an alias persist even after closing d shell.

E.g when I create an alias
$alias py="cd c:/www/py"
It successfully creates d alias and I can use it, but when I close d terminal(I use git bash on windows) n reopen it, d alias is gone.

Put the alias in your ~/.bashrc

~/.bashrc is executed every time you open a new terminal
~/.bash_profile is executed on a login shell (e.g. ssh into or serial console), but not when you open a new terminal

Tnx a lot, I'v created d .bashrc in my home dir and added d alias too. But I noticed that I can only use it (d newly added alias) after restarting d terminal, but I found a way around this here(www.superuser.com/questions/602872/how-do-i-modify-my-git-bash-profile-in-windows) by using:

source .bashrc

after adding a new alias. Tnx