Knowledgebase

 Account's error_log produces flood of missing modules

 Account's error_log produces flood of missing modules. Ex:   From error_log:     [23-Apr-2018...

 central_filter defer (-17): error in filter file: unknown filtering command r_subject: near line 22 of filter file

The error "central_filter defer (-17): error in filter file: unknown filtering command r_subject:...

 Clear cPanel Eximstats DB and Repairing the Eximstats DB

Over the time or due to spammers the eximstats database file may grow to a large size. To clear...

 connection failed for acme-v01-api-letsencrypt org: SSL connect attempt failed

 (Hypertext Transfer Protocol) “post” request to...

 cPanel Account - PHP Startup: Unable to load dynamic library

PHP Warning:  PHP Startup: Unable to load dynamic library './xsl.so' - ./xsl.so: cannot open...

 cPanel Max Defers Occurring for an Account

While viewing exim_mainlog and seeing the following:   enforce_mail_permissions: Domain...

 Create CXS Quarantine Directory

The following command may be used to create a quarantine directory for Configserver's CXS: cxs...

 CSF Error: *WARNING* Binary location for [HOST] [/usr/bin/host] in /etc/csf/csf-conf is either incorrect, is not installed or is not executable

During a CSF start or restart you may encounter this error. This is a result of /usr/bin/host...

 Disable cPanel Brute Force Command Line

To disable the cPanel brute force detection from the command line usee the following:...

 E Sysup: Needed system RPMs were not installed: yum-utils

When encountering the following:E Sysup: Needed system RPMs were not installed: yum-utils*****...

 Error: Multilib version problems found

Finished Dependency Resolution Error:  Multilib version problems found. This often means that...

 error: db3 error(-) from dbenv->failchk: DB_RUNRECOVERY: Fatal error, run database recovery

error: db3 error(-) from dbenv->failchk: DB_RUNRECOVERY: Fatal error, run database recovery...

 Error: rpmdb open failed with cPanel

This can occur with older packages sitting on your drive. Try running the following: rm -f...

 Failed to lock proc mutex: Permission denied

The error : Failed to lock proc mutex: Permission denied can occur when using mod_ruid2 with...

 Failed to start tailwatchd - Unit tailwatchd service entered failed state

Failed to start tailwatchd. Unit tailwatchd.service entered failed state.  tailwatchd.service...

 FSCK Options and Maintenance

Provided below are some useful commands pertaining to FSCK. Update commands to your environment /...

 FTP Failed: Service check failed to complete Unable to connect to port 21

The service “ftpd” appears to be down. The system failed to connect to this service’s TCP/IP...

 How to convert InnoDB to MyISAM

Although at times faster, you will find InnoDB a very large headache when it comes to table...

 Killing cPanel Backups via Command Line / Shell

From time to time you may find the cPanel backup system taking longer and affecting production...

 Manually Clear from Console / Command Line cPanel Exim Mail Queue

To clear the cPanel exim mail queue quickly from a command line / shell use the following...

 ModSecurity: collection_store: Failed to access DBM file /var/cpanel/secdatadir/ip: Permission denied

The error Failed to access DBM file /var/cpanel/secdatadir/ip: Permission denied can occur on...

 Nginx redirecting folder to another host or server

From time to time you may want to proxy out a path to another server or location. To perform a...

 Permission denied: /home/username/ htaccess pcfg_openfile: unable to check htaccess file, ensure it is readable

When checking your error log you find the error 508 or 403 forbidden error in your browser and...

 Recursive chmod / Permission Change Across Directories for a File Type

The following command may be very useful for changing the permissions of a file type such as .php...

 Remount /tmp with exec permission

There are times where you may need to have exec permission available for the /tmp folder. This...

 Repairing and Optimizing all MySQL and MariaDB Databases on the Server

From time to time you will find repairing and optimizing your databases are necessary. From a...

 SpamAssassin Command Line Bayesian Learn Command cPanel

Once it is enabled, it is necessary to train spamassassin to learn what is junk mail and what is...

 This webpage is not available ERR_SSL_VERSION_OR_CIPHER_MISMATCH

This webpage is not availableERR_SSL_VERSION_OR_CIPHER_MISMATCHA secure connection cannot be...

 VPS Time not Correct with Time Server

If you have a problem with your VPS time not staying sync in a Xen VPS you will want to enable...

 Whitelisting Multiple IPs with Mod_Security

The following can be added to the main modsecurity.conf or a whitelist file such as one...

 yum-utils not installed or found on Centos5 64-bit

When yum-utils is not installed or found on Centos5 64-bit the following commands may be used:...