How to Configure Automatic Security Updates on RHEL 7 Keeping a RHEL 7 server patched against known vulnerabilities is one of the most impactful things you can do to improve its security posture. While manual patching is reliable, it requires discipline and can be delayed during busy operational periods. Automating security updates ensures that critical […]
How to Sync Time with Chrony on RHEL 7 Accurate system time is critical for nearly every networked service on a Linux server. Log correlation, SSL certificate validation, Kerberos authentication, database replication, and distributed systems all depend on clocks that are closely synchronized across machines. Red Hat Enterprise Linux 7 ships with Chrony as the […]
How to Set a Hostname and FQDN on RHEL 7 A properly configured hostname is one of the most fundamental aspects of Linux system administration. On Red Hat Enterprise Linux 7, the hostname identifies your machine on the network and appears in log files, shell prompts, and monitoring tools. Getting it right — including the […]
How to Configure Fail2Ban to Protect SSH on RHEL 7 Even with SSH key-based authentication enabled, your server’s port 22 (or whatever port SSH is listening on) is constantly targeted by automated bots scanning the internet for open SSH services. These bots attempt thousands of login combinations per hour. While they cannot succeed against key-only […]
How to Set Up SSH Key-Based Authentication on RHEL 7 SSH key-based authentication replaces password logins with a cryptographic key pair: a private key that stays on your local machine and a public key that you install on the remote server. When you connect, the server challenges your SSH client to prove it holds the […]
How to Configure the Firewall on RHEL 7 Red Hat Enterprise Linux 7 ships with firewalld as its default firewall management solution. Unlike its predecessor iptables, which required you to manage chains and rules as a flat list, firewalld introduces the concept of zones — named trust levels that you assign to network interfaces and […]
How to Add and Delete Users on RHEL 7 User account management is one of the most fundamental administrative tasks on any Linux server. On Red Hat Enterprise Linux 7, the standard command-line tools — useradd, usermod, userdel, and passwd — give you precise control over every aspect of a user’s account: their login name, […]
Initial Server Setup with RHEL 7 Setting up a fresh Red Hat Enterprise Linux 7 server correctly from the start is one of the most important steps you can take to ensure long-term security and stability. Whether you have just provisioned a bare-metal machine or a cloud instance, this guide walks you through every essential […]
DevSecOps integrates security into every stage of the software delivery lifecycle rather than treating it as a final gate before release. On RHEL 8 you can assemble a complete DevSecOps pipeline from open-source components, all running on your own infrastructure: a Git server for source control, a CI/CD engine for automation, static analysis and container […]
Envoy Proxy is a high-performance, cloud-native Layer 7 proxy originally built at Lyft and now a CNCF graduated project. Unlike Nginx or HAProxy, Envoy is designed with dynamic configuration via xDS APIs and deep observability baked in, making it the proxy of choice for service meshes such as Istio. On RHEL 8 you can run […]
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