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Introduction The error “bash: php: command not found” occurs when the system cannot locate the PHP binary. This usually happens because the PHP path is not included in the $PATH variable. Prerequisites Implementation bash: php: command not found [root@01 ~]# php -v-bash: php: command not found[root@01 ~]# A common type… Continue Reading -bash: php: command not found

Linux, Windows, PHP, MySQL, cPanel, Plesk , etc and their fixes: Exim interface IP address

Introduction In a cPanel/WHM server, Exim is the default Mail Transfer Agent (MTA) responsible for sending and receiving emails. By default, Exim uses the server’s main IP address for outbound email delivery. However, in some cases—such as improving email deliverability, IP reputation management, or separating mail traffic—you may need to… Continue Reading Exim interface IP address

Accessibility Controls access.cpl Add Hardware Wizard hdwwiz.cpl Add/Remove Programs appwiz.cpl Administrative Tools control admintools Automatic Updates wuaucpl.cpl Bluetooth Transfer Wizard fsquirt Calculator calc Certificate Manager certmgr.msc Character Map charmap Check Disk Utility chkdsk Clipboard Viewer clipbrd Command Prompt cmd Component Services dcomcnfg Computer Management compmgmt.msc Date and Time Properties timedate.cpl… Continue Reading Windows CMD commands – DOS commands

Introduction ModSecurity is a widely used web application firewall (WAF) that helps protect websites from common attacks such as SQL injection, cross-site scripting (XSS), and other vulnerabilities. It is commonly enabled in hosting environments managed through cPanel. However, in some cases, ModSecurity rules may incorrectly block legitimate requests from a… Continue Reading Disable mod_security rule for a specific application for a specific domain

Introduction Sometimes, after updating the nameserver IPs, WHM may still display the old IP address. This happens because WHM reads the data from a .yaml file rather than directly from the configuration file. Prerequisites Implementation After changing the nameserver IP address in /etc/nameserverips WHM, it may still show the old… Continue Reading Nameserver IPs is not showing correctly

Introduction Virtuozzo (formerly OpenVZ) is a powerful operating system-level virtualization technology that allows a single physical server to run multiple isolated Linux environments known as containers or Virtual Private Servers (VPS). These containers behave like independent servers but share the same Linux kernel, making them lightweight, fast, and resource-efficient. Prerequisites… Continue Reading Virtuozzo – VPS commands – Open VZ commands

Introduction DKIMProxy is a tool used to implement DomainKeys Identified Mail (DKIM) for email authentication. It is written in Perl and requires several Perl modules for proper functionality. Prerequisites Install the required Perl modules using CPAN: Implementation Step 1: Install Mail::DKIM module wget http://search.cpan.org/CPAN/authors/id/J/JA/JASLONG/Mail-DKIM-0.39.tar.gztar -zxvf Mail-DKIM-0.39.tar.gzcd Mail-DKIM-0.39perl Makefile.PLmakemake testmake install… Continue Reading DKIM – enable in EXIM

Introduction MySQL stores all database data, tables, indexes, and logs in a default directory known as the data directory (commonly /var/lib/mysql on Linux systems). In many real-world scenarios, administrators need to change this default location—for example, when the system disk is running out of space, for performance optimization, or when… Continue Reading How to Change Mysql data directory

Introduction You may receive a notification about domain expiration in Plesk, indicating that the domain’s validity period is about to expire. This alert helps ensure timely renewal and prevents service interruption. Prerequisites Implementation Notification Example: Subject: Domain event notification: The period of validity is about to expire. The validity period… Continue Reading Domain Expiry Notification and Validity Period Update in Plesk