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How to Install Graylog for Centralised Log Management on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Graylog for Centralised Log Management on RHEL 7

How to Install Graylog for Centralised Log Management on RHEL 7 Centralised log management is essential for any production environment. When servers, applications, and network devices each write logs independently, troubleshooting incidents becomes painfully slow. Graylog solves this by aggregating logs from every source into a single, searchable platform. Built on top of MongoDB and […]

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How to Configure Logrotate for Application Logs on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure Logrotate for Application Logs on RHEL 7

How to Configure Logrotate for Application Logs on RHEL 7 Log files are essential for diagnosing problems and auditing system activity, but left unmanaged they will silently consume all available disk space and eventually bring a server to a halt. Logrotate is the standard tool on RHEL 7 for automating log file rotation, compression, and […]

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How to Install Netdata on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Netdata on RHEL 7

How to Install Netdata on RHEL 7 Netdata is a real-time performance monitoring agent that delivers per-second metrics with zero configuration on most Linux systems. Unlike heavier monitoring solutions that scrape on 15-second or 1-minute intervals, Netdata collects and stores data every second, making it ideal for diagnosing transient performance problems that would be invisible […]

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How to Install Zabbix on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Zabbix on RHEL 7

How to Install Zabbix on RHEL 7 Zabbix is a mature, enterprise-grade open-source monitoring platform that supports agent-based and agentless monitoring of servers, network devices, applications, and cloud resources. It combines metrics collection, event correlation, alerting, and visualisation in a single self-hosted solution — making it a compelling choice for organisations that need full control […]

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How to Set Up the ELK Stack on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up the ELK Stack on RHEL 7

How to Set Up the ELK Stack on RHEL 7 The ELK Stack — Elasticsearch, Logstash, and Kibana — is the industry-standard open-source solution for centralised log management and analysis. Elasticsearch stores and indexes log data at scale, Logstash ingests and transforms log streams from any source, and Kibana provides a powerful web UI for […]

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How to Harden Web Servers: Security Headers, CSP and HSTS on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Harden Web Servers: Security Headers, CSP and HSTS on RHEL 7

How to Harden Web Servers: Security Headers, CSP and HSTS on RHEL 7 HTTP security headers are one of the most cost-effective controls available to web server administrators. They instruct the browser to enforce strict content handling rules, preventing common attacks such as cross-site scripting (XSS), clickjacking, MIME-type confusion, and protocol downgrade attacks — without […]

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How to Scan for Vulnerabilities with OpenVAS on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Scan for Vulnerabilities with OpenVAS on RHEL 7

How to Scan for Vulnerabilities with OpenVAS on RHEL 7 OpenVAS (Open Vulnerability Assessment System), now part of the Greenbone Vulnerability Management (GVM) framework, is one of the most capable open-source vulnerability scanners available. It maintains a continuously updated feed of over 50,000 Network Vulnerability Tests (NVTs) and can detect misconfigurations, outdated software, missing patches, […]

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How to Configure Mandatory Access Control with SELinux Policies on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure Mandatory Access Control with SELinux Policies on RHEL 7

How to Configure Mandatory Access Control with SELinux Policies on RHEL 7 SELinux (Security-Enhanced Linux) is a mandatory access control (MAC) framework built into the Linux kernel and deeply integrated into RHEL 7. Unlike discretionary access control (DAC), which is based on user and group ownership, SELinux enforces fine-grained access rules based on security contexts […]

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How to Use OpenSSL to Generate, Sign and Manage SSL Certificates on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Use OpenSSL to Generate, Sign and Manage SSL Certificates on RHEL 7

How to Use OpenSSL to Generate, Sign and Manage SSL Certificates on RHEL 7 OpenSSL is the standard open-source toolkit for implementing the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, and it is used on almost every Linux server in production. On Red Hat Enterprise Linux 7, OpenSSL is installed by default […]

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How to Configure SELinux on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure SELinux on RHEL 7

How to Configure SELinux on RHEL 7 SELinux (Security-Enhanced Linux) is a mandatory access control (MAC) system built into the Linux kernel and enabled by default on every RHEL 7 installation. Unlike traditional Unix discretionary access control (DAC), which lets file owners decide who can access their files, SELinux enforces a policy defined by the […]

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