Network bonding and teaming both combine multiple physical network interfaces into a single logical link, providing redundancy, increased throughput, or both. On RHEL 8, NetworkManager is the recommended way to configure both technologies using the nmcli command-line tool — no manual edits to legacy ifcfg files required. This tutorial covers creating an active-backup bond with […]
Serving web traffic over HTTPS requires a valid TLS certificate and a correctly configured web server. On RHEL 8, the openssl tool is available out of the box and lets you generate RSA keys, create certificate signing requests, and issue self-signed certificates entirely from the command line. Self-signed certificates are ideal for internal services, staging […]
How to Set Up Loki and Promtail for Log Aggregation on RHEL 7 Loki is a horizontally scalable, highly available log aggregation system developed by Grafana Labs. Unlike traditional log management solutions that index the full text of every log line, Loki indexes only the metadata labels attached to each log stream. This makes it […]
Deno is a modern, secure runtime for JavaScript and TypeScript built on V8 and Rust. Unlike Node.js, Deno ships TypeScript support out of the box, enforces an explicit permissions model that prevents scripts from accessing files or the network without your consent, and bundles a formatter, linter, and test runner in a single executable. On […]
Grafana transforms raw Prometheus time-series data into actionable visual dashboards through a drag-and-drop interface backed by the powerful PromQL query language. On RHEL 8 with Prometheus and Node Exporter already collecting host metrics, you can build a professional server monitoring dashboard in under an hour — displaying CPU usage, memory consumption, disk I/O, and network […]
How to Set Up iSCSI Storage on RHEL 7 iSCSI (Internet Small Computer System Interface) is a block-level network storage protocol that transports SCSI commands over TCP/IP networks. It is widely used in enterprise environments to provide shared block storage without the cost of dedicated Fibre Channel hardware. RHEL 7 ships with full iSCSI support […]
Skopeo is a command-line tool for working with container images and registries without requiring a running container daemon. On RHEL 8 it is available directly from the default repositories, making it one of the easiest container tools to install and use. Unlike Docker CLI, Skopeo can inspect, copy, sync, and delete images across registries without […]
Nginx server blocks — equivalent to Apache’s virtual hosts — allow a single Nginx instance to serve multiple websites from one server. Each server block defines a distinct configuration scope that responds to specific domain names or IP addresses. On RHEL 8, additional server block configuration files are stored under /etc/nginx/conf.d/ and automatically loaded by […]
The journalctl command is the primary interface for querying and browsing logs collected by systemd-journald on RHEL 8. Unlike traditional syslog files, the systemd journal stores structured, binary log data that can be filtered by unit, priority, time range, PID, and more. Mastering journalctl allows administrators to diagnose service failures, track kernel events, and export […]
How to Install and Configure Consul for Service Discovery on RHEL 7 As applications grow beyond a single server, tracking where every service is running — and whether it is healthy — becomes a significant operational challenge. Consul, developed by HashiCorp, is a distributed, highly available service mesh and service discovery tool that solves this […]
