Linux

Product images not working and giving “Warning: Creating default object from empty value” Error

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Last day there was an issue for a wordpress installation. None of the product images are not working and if we take the image directly in the browser, we can see the below errors

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Warning: Creating default object from empty value in /home/wp-user/public_html/wp-content/plugins/shopp/core/model/Asset.php on line 123

Warning: Cannot modify header information – headers already sent by (output started at /home/wp-user/public_html/wp-content/plugins/shopp/core/model/Asset.php:123) in /home/wp-user/public_html/wp-content/plugins/shopp/core/model/Asset.php on line 199

Warning: Cannot modify header information – headers already sent by (output started at /home/wp-user/public_html/wp-content/plugins/shopp/core/model/Asset.php:123) in /home/wp-user/public_html/wp-content/plugins/shopp/core/model/Asset.php on line 200

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Install Redis Daemon and Redis PHP extention on CentOS/RHEL/cPanel

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Redis is an open-source, networked, in-memory, key-value data store with optional durability. It is written in ANSI C. It’s a “NoSQL” key-value data store. More precisely, it is a data structure server. To install Redis as daemon on a CentOS/RHEL/cPanel server, do the following steps cd /usr/local/ wget http://download.redis.io/releases/redis-2.8.12.tar.gz tar -xvzf redis-2.8.12.tar.gz cd redis-2.8.12 make … Read more

How to disable service alerts in DirectAdmin

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Sometimes people would like to disable service warning alerts. There is an option in DirectAdmin at Home >> Administrator Settings >> ” Notify all admins whenever a service goes down using the messaging/ticket system”. But that will disable all alerts and if you want to disbale alerts for a specific server do the following steps … Read more

Blocking Maliciuos bots from accessing your website

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It is always a nuisance when unnecessary bots start hitting your website. It can increase CPU load on your server and may cause MySQL overhead as well, if your website driven by any database. Though the bot access says to be controlled using robots.txt files, most malicious bots do not honor rules defined in robots.txt file. The most reputed … Read more

[ERROR] /usr/sbin/mysqld: Can’t open file

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I got this error while migrating  huge amount of accounts from one cpanel server to  another.

[ERROR] /usr/sbin/mysqld: Can’t open file: ‘./dbname/tablename.frm’ (errno: 24)

errno: 24 means there is too many open files.  There is a mysql variable named “open_files_limit"  which shows how many open files are allowed in mysql by default. We cannot update this valuse using “Set”  command as this variable is a read only variable.

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