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Database error on roundcube on CWP Panel

By PrasadNaik
June 25, 2026

While rest of the website were working fine and while accessing my email account via auto-login it was showing an error Database error connection failed Please contact server administrator After checking the logs in /usr/local/cwpsrv/var/services/roundcube/logs/errors.log found the error due to missing table roundcube.carddav_addressbook 18-Jun-2026 19:39:09 +0000]: <3c79m5k8> DB Error: [1146] Table ’roundcube.carddav_addressbooks’ doesn’t exist (SQL […]

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Change user in Ubuntu OS

By PrasadNaik
June 25, 2026

Normally Ubuntu allows you to install OS as non root username So you need to login to server as non root user and run command mentioned below to login as root user sudo -i Once you login as root user change below mentioned parameter in /etc/ssh/sshd_config and uncomment PermitRootLogin paramter and change to to yes […]

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ERROR “Let’s Encrypt™” DNS DCV error on autoSSL cpanel

By PrasadNaik
June 24, 2026

ERROR “Let’s Encrypt™” DNS DCV error (*.xtklaos.com): 400 urn:ietf:params:acme:error:dns (There was a problem with a DNS query) (DNS problem: looking up TXT for _acme-challenge.xxxtklaos.com: DNSSEC: DNSKEY Missing: validation failure <_acme-challenge.xxxtklaos.com. TXT IN>: No DNSKEY record [misc failure] from 142.214.184.xxx for key xxxtklaos.com. while building chain of trust) Was getting an issue where autoSSL was giving […]

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/tmp in read only mode cPanel server

By PrasadNaik
June 12, 2026

/tmp in server was not allowing any write on it causing mysql to fail below is the solution to fix it Stop all services using /tmp using below command systemctl stop httpd systemctl stop mysqlsystemctl stop cpanel umount -f /var/tmp rm -fv /usr/tmpDSK /scripts/securetmp The /tmp is recreated and all services are working fine

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[authz_core:error] [pid 180487:tid 180487] [client 129.204.9.155:44768] AH01630: client denied by server configuration

By PrasadNaik
January 15, 2026

Was getting this error on one of the website using wordpress where was not able to change theme or plugin and reverting to main page On troubleshooting this issue found this error due code in .htaccess file in account Renamed the .htaccess and this fixed the issue The code in .htaccess was Require all denied […]

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Ping Check for /24 ?

By PrasadNaik
October 3, 2025

Well you can check which IP are in use using nmap sudo nmap -sP -PR 212.122.161.* It will scan entire /24 and show results

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Device eth0 does not seem to be present, delaying initialization” Error

By PrasadNaik
October 2, 2025

Device eth0 does not seem to be present, delaying initialization” Error’ Was getting this error after migrating centos 6 VM to new host The best way to fix this isssue was deleting file rm /etc/udev/rules.d/70-persistent-net.rules and rebooting vm.. Network was up and issue fixed

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Test Post for WordPress

By PrasadNaik
February 21, 2025

This is a sample post created to test the basic formatting features of the WordPress CMS. Subheading Level 2 You can use bold text, italic text, and combine both styles. Bullet list item #1 Item with bold emphasis And a link: official WordPress site Step one Step two Step three This content is only for […]

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Change wordpress user password from CLI

By PrasadNaik
February 18, 2025

If you are not able to login to wordpress admin and want to reset password Follow below steps Login to server as root user Check database name in wp-config.php file grep DB_NAME wp-config.php mysql use DB_NAME; mysql> show tables; +————————–+| Tables_in_onlinesu_wp637 |+————————–+| wp_commentmeta || wp_comments || wp_links || wp_options || wp_postmeta || wp_posts || wp_swp_testimonial […]

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