In this category, you will find CloudLinux OS-related guides, FAQs, setup instructions, and troubleshooting articles written by our Support Engineers. Those will help you to tackle the most frequent problems, answer the most frequent questions, and explain non-trivial setups. Visit our Documentation page for administration guides and manuals where all our features are described in detail: https://docs.cloudlinux.com/
Getting Started
- Does CloudLinux Subsystem for Ubuntu support DirectAdmin?
- You have third-party kernel module(s) rpm installed
- CloudLinux Manager is not available after CloudLinux installation is completed.
- Recommended CloudLinux & control panel conversion order
- How do I install CloudLinux from scratch or convert existing server
- Integrating CloudLinux Components into a Custom Control Panel
Known Issues
- Unable to use ClamAV on DirectAdmin servers
- /opt/alt/curlssl11/usr/lib64/libcurl.so.4: undefined symbol: nghttp2_session_callbacks_set_error_callback
- Bug in cagefs_enter utility leads to autoreponder issues on cPanel servers.
- Check service `cl_plus_sender` is present, enabled and active: FAILED
- SSA-agent high CPU usage
- WHM account terminating fail: No module named 'wpos_modify_user_hook'
FAQ
- How to prepare your server(s) before ticket creation and provide replication steps for the Support Team
- How to authenticate your server for Support Team and use the SSH access form?
- Is it possible that LVE will use the server swap if there's a lack of ram for it?
- How to submit a Feature Request for CloudLinux products?
- CageFS remount fixed my issue, but support states that CageFS is not the problem, why?
- CloudLinux OS life cycle
PHP Selector
- PHP Selector Integration with cPanel
- PHP Selector Integration with Plesk Panel
- PHP Selector Integration with DirectAdmin
- Missing MySQL extension or "MySQL_ND vs MySQL"
- Is PHP 8.2 available for Cloudlinux
- PHP Warning: Module "mysqli" is already loaded in Unknown on line 0 Error
Limits & LVE Stats
- How to backup and rebuild LVE database
- LVE error: error: 'NoneType' object has no attribute 'initialize'
- Can not connect to database; MySQL-client libraries package not installed
- LVE limit not set after Package change
- What is this message: WARNING: YOU ARE INSIDE LVE ?
- LVE enabled users have RAM usage on 100% and invalid values in meminfo
CageFS
- Error extracting /home/username/backups/backup/home.tar.zst : /bin/tar: ./.cagefs/tmp/mysql.sock: Cannot create symlink to ‘/var/lib/mysql/mysql.sock’: Permission denied
- Warning: session_start(): open(/var/cpanel/php/sessions/alt-php* failed: No such file or directory
- Ubuntu SSL routines:tls_process_server_certificate:certificate verify failed
- CageFS is not automatically enabled for new users
- PHP Unable to load dynamic library for all CageFS enabled users
- How to disable command in CageFS
Apache mod_lsapi PRO
- "mod_lsapi" broken after update: Connect to backend failed: connect to lsphp failed: 110
- Unable to install mod_lsapi
- Invalid php.ini is used for Plesk lsapi domains
- ReceiveAckHdr: timeout 300 is exceeded
- 507 Insufficient Storage error
- Unable to install mod_lsapi. CRIU dependency
MySQL Governor
- Email: Maybe Governor is not started. JSONDecodeError
- governor-mysql-1.2-83.1 update caused websites slowness.
- Huge size of /usr/share/lve/dbgovernor/install_trace.log
- 503 errors on DB Goveronor enabled website
- ERROR: mysql.so is not found. Please install alt-phpXX-mariadb106 package
- Database user not restricted by Governor
CloudLinux Kernels
- How to choose the correct kernel to boot on CloudLinux OS 7
- Is a hybrid kernel installed by default on a CloudLinux OS 7 server?
- The "Reboot your system to update the kernel" after update and restart the server for CloudLinux OS 8.7
- swiotlb buffer is full (sz: 256 bytes), total 0 (slots), used 0 (slots)
- The "package kmod-lve requires kernel(bpf_trace_run12)" error during the yum update
- CloudLinux Manager shown: Reboot your system to update the kernel
Python/Ruby/NodeJS Selectors
- [ERR_REQUIRE_ESM]: Must use import to load ES Module
- The received data is wrong... fork: retry: Resource temporarily unavailable
- Python selector: Unexpected issue(s) happened during importing python applications
- Installed CloudLinux component is indicated as not installed
- How to add an ALT-NodeJS version?
- PHP Selector: "No selector dir for user XXX"
Yum & RPM Problems
- Can't update packages on CloudLinux OS 8
- Yum install of alt-python37-libs conflicts with file from package alt-python37-docopt
- [Errno 14] HTTPS Error 404 - Not Found Trying other mirror.
- When installing ea-apache24-mod_lsapi the "Cannot install the best candidate for the job" error occurs
- "Requires: rhn-client-tools" error while yum operations
- Failed to retrieve repodata/repomd.xml from cloudlinux-x86_64-server-* error was [Errno 14] HTTPS Error 404 - Not Found
Fighting High Load
- Understanding the High Load Average root cause
- Delay when loading website for the first time and high TTFB values when lsapi handler is used.
- How big your swap partition to be
- Load Averages is high on VMware VPS
- How do I install VMware-Tools/Improving server performance when on VMware
- High iowait and/or load average when APC enabled in PHP Selector
General Administration & non-CloudLinux Guides
- CloudLinux Manager Blank Page in DirectAdmin
- CageFS user interface is now part of CloudLinux LVE Manager. The plugin version will soon be deprecated.
- Unable to build Apache on DirectAdmin server after CloudLinux install
- CL+_sender_daemon Sending retries over Connection aborted
- PHP Warning: PHP Startup: Unable to load dynamic library 'gd.so'... undefined symbol: gdImageCreateFromAvif
- AccelerateWP is showing "No advice" for the website