Error: bad username; while reading /etc/crontab

This error means we haven't set up the username on the crontab for a cron job. you need to define the username before the command section. Like the following:

0 1 * * *  root /var/www/ispcp/engine/backup/ispcp-backup-all yes &>/var/log/ispcp/ispcp-backup-all-mngr.log

See the book OpenCart 1.4 Template Design Cookbook.
See the book Joomla Mobile Development Beginners Guide

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Technical Support:

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Wordpress Plugins:

1. Real-Time Health Data from Every Where:WP plugin to display real-time health data & increase sale by promoting user specific products according to health information: garazlab.com.
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Opencart Extensions:

1. Product Based Quantity Wise Shipping: Find it here.
2. OpenSSLCOMMERZ: integrate SSLCOMMERZ with opencart: Find it here.
3. Fine Search v.1.0 - Improves Opencart search feature to find relevant: Find it here.
4. Opensweetcaptcha - An easy way to generate attractive captcha for your system!: Find it here.
5. Custom Field Product - add unlimited custom fields to the product form: Find it here.
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My Books:

1. OpenCart 1.4 Template Design Cookbook.
2. Joomla Mobile Development Beginners Guide