Guide to setup crontab

If you have Ubuntu based server

1) Run in console of the server
>> crontab -e

2) Then you will see list of cron job in a text editor, you need to add following line at the end
>> * * * * * cd <path to the file directory> && /usr/bin/python channel.py

Example: if your path is /srv/www/public_html/youtube/
Then, you need to append following line and save it:
* * * * * cd /srv/www/public_html/youtube/ && /usr/bin/python channel.py


Then, channels will be created as /srv/www/public_html/youtube/channels.txt