rhel

Discover how to simplify YAML file manipulation with `yq`, an intuitive command-line tool designed for streamlined processing of YAML configurations. This guide covers installation on Linux distributions like Ubuntu, Fedora, and openSUSE, and usage examples such as reading, modifying, and merging YAML data. Ideal for developers and system administrators, `yq` maintains original file formatting and provides a powerful alternative to manual editing. Explore its features at [LinuxBash.sh](https://www.linuxbash.sh/post/yq-process-yaml-files-with-ease).

Learn how to mount filesystems in Linux with user-specific permissions to enhance security in multi-user environments. This guide delves into using `mount` command, editing `/etc/fstab`, and options like `uid`, `gid`, and ACLs for precise control, along with practical examples for administrators aiming to secure filesystem access.

Master file management using the `mv` command in Unix and Linux, covering both basic and advanced functionalities for moving and renaming files. This guide provides syntax clarifications, options like `-i` for safe operations and `-p` for preserving attributes, alongside practical examples and error management tips, enhancing command-line efficiency and reliability.

This article provides an in-depth look at the system requirements for several popular Linux distributions, including Ubuntu, Fedora, Debian, Arch Linux, Linux Mint, and Raspberry Pi OS. It is designed to help users match their hardware with the appropriate Linux distro, ensuring optimal performance. The guide covers CPU, RAM, and storage needs for each distribution and offers additional resources for further information.

Discover how to manage and manipulate environment variables in Bash efficiently. This guide covers the essentials of setting, viewing, and unsetting these variables, as well as their scope and influence on your scripting work. Perfect for developers and system administrators, the article includes step-by-step instructions and examples to help you master environment variables for better script customization and Linux environment management.

This guide offers comprehensive strategies to manage package conflicts on Linux systems using apt, dnf, and zypper tools. It covers basics of package conflicts, system updates, dependency installation, and advanced resolution options for a smooth Linux experience.

Learn to set up a DHCP server on Linux with instructions on installing and configuring it across various distributions using apt, dnf, and zypper. The guide covers DHCP package installation, dhcpd.conf file setup, IP, DNS, and subnet configurations, ensuring correct IP assignments and reducing manual setup errors for better network management. Further resources provide in-depth information on DHCP setup specifics.

This article delves into Overlay Filesystems (OverlayFS), a union filesystem that combines read-only and writable layers for efficient file management in Linux environments. Ideal for scenarios involving containers or immutable systems, it explains the set-up and benefits, such as improved efficiency and space savings, providing instructions and real-world examples including its application in Docker.

This guide offers comprehensive instructions on how to mount NFS and SMB network filesystems in Linux, from installing necessary packages to configuring server-client relationships. It covers best practices for efficient file sharing and management across systems using NFS and SMB protocols, along with tips for secure and persistent mounting, editing configuration files, and troubleshooting advice to ensure optimal performance and security. Ideal for beginners and experienced users alike.

Explore the benefits and setup process of autossh, a tool that maintains stable SSH connections. Ideal for remote work and server management over unstable networks, autossh automatically restarts SSH sessions after disconnections. This guide covers installation across various Linux distributions like Ubuntu, Fedora, and openSUSE, and provides usage examples with minimal configuration. Perfect for ensuring persistent remote access, autossh enhances your SSH environment seamlessly.

This blog post on LinuxBash.sh is a comprehensive guide to trapping and handling signals in Bash scripts, crucial for ensuring script reliability. It details signal trapping, covers common signals like SIGINT and SIGTERM, and provides examples of the `trap` command for setting up handlers. The article is valuable for those looking to improve script safety and includes sections on package installations for handling tools across various Linux package managers. Further reading links are also provided.

This article delves into UNIX/Linux special permission bits—SUID, SGID, and the Sticky Bit. It explains how SUID lets a file execute with the file owner’s permissions, SGID allows execution with the group's permissions, and the Sticky Bit restricts file deletion in shared directories. It covers their applications, security risks, and crucial role in enhancing multi-user system security and functionality.

Learn to master AppStream on RHEL-based systems for flexible software management. This guide details how to use the `dnf` package manager to search, install, switch, and remove modular packages, providing strategies for managing multiple software versions across various platforms, including Debian/Ubuntu with `apt` and openSUSE with `zypper`. Essential for improving system stability and flexibility.

Guide on automating the renewal of Let’s Encrypt certificates utilizing Linux Bash and Certbot. The process includes installation, initial setup, manual renewal testing, automated renewal via cron jobs, and monitoring through logs to ensure consistent SSL/TLS security without manual effort.

Learn how to monitor and test disk health in Linux using `smartctl`, a tool from the `smartmontools` package. The guide details installing the tool across distributions like Debian, Ubuntu, Fedora, and openSUSE, and explains how to enable SMART, perform health checks, interpret the data, and integrate monitoring into regular system maintenance to prevent data loss and improve performance. Ideal for IT professionals aiming to enhance data integrity and system reliability. Further resources for advanced practices are also provided.

Discover the capabilities of `ethtool` for managing Ethernet settings in Linux systems. This guide covers installation, key features like speed adjustments, and duplex settings through easy-to-follow examples. Whether you're optimizing or troubleshooting network performance, `ethtool` provides essential insights and control for network administrators and engineers.

Learn how to expand your Red Hat Enterprise Linux (RHEL)-based system's software library by enabling the Extra Packages for Enterprise Linux (EPEL) repository. Our guide offers step-by-step instructions on installing EPEL using `yum` or `dnf`, enhancing system capabilities by accessing a broader range of applications and tools not available in the default repositories.

Learn to encrypt filesystems on Linux with LUKS and `cryptsetup` in this detailed guide. Topics include installing `cryptsetup`, setting up a LUKS partition, and managing encrypted volumes. The article provides instructions for enhancing digital security, including automating the unlocking process and tips on key management and backup strategies.

Discover how to access real-time weather updates directly from your Linux terminal using `wttr.in`. This web service allows users to fetch weather forecasts via simple terminal commands like curl or wget, featuring results in ASCII art. Perfect for developers and sysadmins, it integrates easily into scripts and supports multiple locations, enhancing productivity within the command-line interface.

The blog delves into controlling GPIO pins in Linux via the `sysfs` interface, explaining its use in user space for simple file operations on pins. Steps covered include exporting the pin, setting its direction, and manipulating its state. The guide includes examples like LED control and a script for blinking an LED, highlighting the ease and effectiveness of `sysfs` for basic hardware interfacing.