I'm trying to write a command  mytodo to change the current directory to my project directory and saved in /bin/  & changed its permission to executable :
#!/bin/bash
cd /vagrant/backup/toDoApp/
Earlier it was working wherever or whenever i run mytodo it changes my directory to 
/vagrant/backup/toDoApp/ but now suddenly it stopped working now it doesnt changed my cwd.
as i also tried alias but when shutdown or restart machine my alias commands disappears
Please help. 
