Set cron in Linux server

Set cron in Linux server:
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1.sudo apt-get install cron

2. sudo apt-get install php5-cli

3.create testing.php file and give 777 permissions.
sudo chmod 777 /var/www/testing.php

4.sudo crontab -e
in that opened file type this following command

# m h dom mon dow command
* * * * * /var/www/testing.php

*- refers to every minute,every hour , every week.

1. ctrl+x to save ; press Y and give enter

Now your cron will work :)