# How to save a cronjob on nano editor?

I can login to nano or vi through Putty to my web server.

After opening nano editor by typing crontab -e, I enter the following.

# m h dom mon dow command (this comes up always at the top)

*/30 * * * * wget -q -O /dev/null  http://mywebsite.org/admin/cron.php


However I am uncertain what I need to do after this.

Q1. Do I need to save it? If so, how to save this file?

I can't find any command to save. There are ^Get help, ^Writeout etc.

At the top of the screen, it says the following. GNU nano 2.0.7 File: /tmp/crontab.Q1SgwM/crontab

Q2. Is this the place where this cron is stored? Then how can I open it if I want to edit/change?

Q3. Is that all I need to do? Is the cron starting automatically?