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Bogdan Shyshka is CloudLinux top-tier technical support engineer. In this role, he assists customers with inquiries through the online helpdesk. He has applied his problem-solving skills and his positive attitude to serve as a bridge between customers and CloudLinux developers. He is one of the main contributors on the CloudLinux forum, and a frequent blogger. He is an expert in Linux, working with various companies in the hosting market, including psoft.net, parallels.com, and vps.net, since 2003.

Your older kernel might cause issues during CloudLinux OS update. Here is how to fix it.
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Your older kernel might cause issues during CloudLinux OS update. Here is how to fix it.

Your older kernel might cause issues during CloudLinux OS update. Here is how to fix it.
During the recent update to CloudLinux OS version 7.3, some servers have crashed due to a race condition between kmem uncharge and charge reparenting. The issue is not present on last production kernel and only older kernels are affected. If you are still running kernel-3.10.0-427.10.1.lve1.4.22 or older, you could be affected. The safe upgrade to ...
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usuxesuserum usuxesuserumPP
If you was using older kernel and it was updated - yes you need to reboot.
Monday, 21 November 2016 13:14
usuxesuserum usuxesuserumPP
The issue could happens only during initial upgrade. You are fine if passed it already.
Monday, 21 November 2016 13:59
usuxesuserum usuxesuserumPP
Not yet, work in progress.
Monday, 21 November 2016 13:13
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Incorrect Path used for mariadb10 mysql module symlinks

After the recent alt-php updates some servers with mariadb10 installed faced an issue when mysql modules were symlinked to wrong location, example of such broken symlinks: 66061805 0 lrwxrwxrwx 1 root root 40 Jul 22 02:26 ./pdo_mysql.so -> /opt/alt/php55/etc/mysql10./ pdo_mysql.so 66061796 0 lrwxrwxrwx 1 root root 37 Jul 22 02:26 ./mysqli.so -&g...
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Different PHP versions per directories using PHP Selector

We had few requests to support different PHP versions per directory. While this is not available using PHP Selector UI, it is fairly simple to do manually. The important requirement is that PHP must be set to be running in SuPHP mode. We are soon to release our own PHP module for Apache - that would also support such mode of operation. Tested with ...
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Important CloudLinux 6 openssl update

New package openssl-1.0.1e-16.el6_5.7 has been released earlier today that fixes critical security issue CVE-2014-0160 , details could be found here: https://rhn.redhat.com/errata/RHSA-2014-0376.html http://lists.centos.org/pipermail/centos-announce/2014-April/020249.html To update it immediately please do the following: # yum clean all# yum update...
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What inode limit value is reasonable?

Inode limit can be considered as a number of files and directories one customer can own. Default wordpress installation has approx 1,100 files/directories , default magento install is 10,000 , you would need to consider at least 30,000 to be an inode limit for minimal package for your customers. You can calculate a limits basing on current usage of...
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How to update kernel or boot a previous one. GRUB

The GNU Grand Unified Boot Loader(GRUB) is a program which enables the user to select which installed operating system or kernel to load at system boot time. It also allows the user to pass arguments to the kernel. The GRUB configuration file (located in /boot/grub/grub.conf) is used to create a list of operating systems to boot in GRUB's menu inte...
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Getting latest PHP in cPanel with PHP Selector

We are trying to keep our alternate PHP up to date providing latest major stable PHP versions that are available, currently the full list of supported versions is: 4.4.9 5.2.17 5.3.27 5.4.17 5.5.0 You may have noted that latest version provided by cPanel is 5.4. To say more - while using PHP Selector, you do not need to use EasyApache anymore for a...
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Extending PHP Selector - Part II: Pecl modules

If you have decided that you want to build your own PHP extension for your customers to use, you might want to do it for each and every supported version of PHP that you have installed. While you don’t have to do that, by installing it for all versions will remove questions that might come up from someone who wants to switch from one version of PHP...
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Extending PHP Selector - Part I

PHP Selector packages wide number of PHP extends, but sometimes you might want to add one more. You can install additional PEAR packages serverwide by running /opt/alt/phpXX/usr/bin/pear command line tool, where XX is php version you need a package for. For example to install Auth package for php52 you would do: /opt/alt/php52/usr/bin/pear install ...
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PHP Selector and restricting PHP functions

We are often asked how to prevent particular php function from being used by all clients. This is especially true about functions like exec, passthru, etc... This is something that can be easily done with php-selector. Your customers are only allowed to modify directives listed in /etc/cl.selector/php.conf file. For example if you want to block sys...
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