GRand Unified Bootloader (GRUB) is a default bootloader in all Unix-like operating systems. As promised in our earlier article “How to reset a forgotten root password“, here we are going to review how to protect GRUB with passwords.
The post How to Set…
SSH is one of the main key services in Linux/Unix-based systems. SSH represents Secure Socket Shell. SSH protocol is used to access the remote server/system with an encrypted method of login using the default TCP/IP port 22 or a custom-based port number. This service is mainly used by System and Network Administrators to execute commands […]
The post Basic and Most Useful ssh Client Commands for Linux appeared first on Linux Today.
Suricata is popular as a result of it being an independent and open source threat detection engine. It’s a lifesaver for network administrators that are looking for a seamless and performant way to examine and manage network traffic issues. Learn…
Data replication is the process of copying your data across multiple servers to improve data availability and enhance the reliability and performance of an application. In MySQL replication, data is copied from a database from the master server to other nodes in real-time to ensure consistency of data and also to provide backup and redundancy. […]
The post How to Setup MySQL Replication in RHEL, Rocky and AlmaLinux appeared first on Linux Today.
xfs_repair command repairs corrupt or damaged XFS filesystems. It’s highly scalable, high-performance and is designed to effectively repair even very large file systems with many inodes. Unlike other Linux file …
The post How to Check and Repair XFS Filesystem in RHEL first appeared on 2DayGeek.
This guide explains how to solve error rpmdb damaged header by rebuilding the RPM database in Fedora, RHEL, CentOS, AlmaLinux and Rocky Linux.
The post How to Solve Error “rpmdb damaged header” in Fedora, RHEL appeared first on Linux Today.
The DNF (Dandified Yum) is the next-generation version of the YUM (Yellowdog Updater, Modified), is an open-source default package manager for Red Hat-based Linux distributions, that is used for getting, installing, upgrading, removing, and querying pa…
I already wrote about migrating from CentOS 8 to CentOS Stream. Now, I am migrating Linode VM from CentOS 8 to Rocky Linux 8. The server runs a very simple workload that includes PHP 8.1, MariaDB server and Nginx, and SELinux and firewalld.
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The release of CentOS Stream 9 has been carried out before CentOS Linux 8 expires at the end of this year. The distro is based on Fedora 34, the same code base that RHEL 9 uses.
The post CentOS Stream 9 is Now Generally Available appeared first on Linu…
As you know, CentOS 8 is ending soon. Red Hat is making the shift from CentOS 8 to CentOS Stream. CentOS stream places itself between Fedora Linux and RHEL. It is not 100% RHEL clone but ahead of RHEL development. Think of it as a midstream distro. Of …
DNF stands for Dandified YUM, a completely updated version of YUM Package Manager. It was originally introduced on Fedora 18 and has now become the default package manager on Fedora 22, RHEL, and CentOS 8 to handle the RPM package management. DNF improves the deficiencies of YUM, including poor performance, high memory usage, and slowness […]
The post An Introduction to DNF with 20 Examples appeared first on Linux Today.
This guide will teach you how to use the ‘ls’ command in Linux. All the below examples of the ‘ls’ command are tested on RHEL/CentOS 7.6.
Linux/Unix platform ‘ls’ command is one of the most repeatedly used commands. …
This guide will teach you how to use the cat command in Linux. All the below examples were tested on RHEL/CentOS 7.6. ‘Cat’ is one of the most commonly used commands in Linux operating systems (short for “concatenate”). This is a standard Unix command that concatenates and displays files. Using the cat command, you can […]
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In this article, you will learn how to configure a Sendmail server to forward all mail generated from localhost to another SMTP server in the RHEL system.
The post How to Configure a SMTP Relay Host in Sendmail appeared first on Linux Today.
By default, the sendmail runs locally on localhost.localdomain and tries to send the mail with the root@localhost.localdomain to the remote smtp server, which would get rejected as the localhost.localdomain will …
The post How to configure a SMTP relay host in Sendmail first appeared on 2DayGeek.
Linux’s ps (processes status) is used to check the information on its running processes. The process is nothing but a program in Linux/Unix to execute a specific task. The ps command in Linux is used to monitor all the currently running activities along with USER, PID, %CPU, %MEM, VSZ, RSS, TTY, STAT, START, TIME, COMMAND. […]
The post The Basic ‘ps’ Command to Monitor Linux Processes (with Examples) appeared first on Linux Today.
In this guide, learn how to check if an RHEL (or CentOS 6/7/8) system is vulnerable to a CVE. Also, learn how to mitigate these issues if you find your system is vulnerable.
The post How to Check if an RHEL System Is Vulnerable to a CVE appeared first …
The web and database servers, along with the well-known server-side language, are not available in their latest versions from the major distributions’ official repositories. If you like to play or work with cutting-edge software, you will need to eithe…
The echo command is one of the most basic and important commands in scripting and programming. This command displays or prints arguments at the terminal. The command is included in all distributions (operating systems) as either the shell or bash. Usually, developers or programmers use echo commands in both debugging and building of products such […]
The post Basic Echo Command with Examples in Linux appeared first on Linux Today.
This guide explains how to download an RPM package with all dependencies in RHEL-based systems such as CentOS, Fedora, AlmaLinux, and Rocky Linux.
The post How to Download an RPM Package with All Dependencies appeared first on Linux Today.