Daylight Savings Time (DST) is a system designed to adjust clocks forward by one hour during warmer months to maximize daylight usage and then revert back to standard time during colder months. While most modern operating systems handle DST transitions automatically, the way these adjustments are managed differs between Windows and Linux. This article explores … Read more
Introduction If you’ve worked with Linux systems, you may have noticed directories with names like /etc/logrotate.d/ or /etc/cron.d/. These .d folders follow a convention used by many services, from MariaDB to SSH, and from the kernel to PAM. Once you understand their purpose, you’ll start seeing them everywhere—such as mariadb.conf.d, sshd_config.d, modprobe.d, and pam.d. But why does a system need directories like /etc/logrotate.d/ for placing configuration files … Read more
Introduction In SUSE Linux Enterprise Server (SLES) clusters, the hb_report command is an essential tool for gathering detailed diagnostic information about a High-Availability (HA) cluster. This tool is crucial for troubleshooting cluster issues, identifying failures, and analyzing the health of the cluster environment. Whether you’re an administrator working on an HA cluster or a support engineer diagnosing issues, hb_report simplifies the process by … Read more
Linux provides various commands for text formatting and editing, and one particularly useful command is the nl command. This tool allows you to add line numbers to each line of a text file or input, making it easier to read and organize content. What Does the nl Command Do? The nl command displays the contents of a text file with line numbers added … Read more
Troubleshooting Linux systems often requires browsing logs to identify issues effectively. Knowing the right keywords to search for can help narrow down problems quickly. This guide categorizes common issues and provides relevant keywords and log file suggestions for Linux systems, whether in cloud environments or on-premises. 1. Authentication and Access Issues Keywords: Logs to Check: … Read more
Encountering issues when trying to delete, copy, rename, or move a file in Linux can be frustrating. This guide outlines common causes and solutions to help you troubleshoot and resolve these problems efficiently. Common Causes and Solutions 1. Does the File Actually Exist? Sometimes, the file you are trying to manipulate might not exist, or the … Read more
Mastering Linux commands can significantly improve your efficiency in the terminal. Whether you’re a beginner or an experienced user, these handy tips will help you navigate, manage files, and optimize your workflow. 1. Switch Back to the Last Directory If you need to quickly return to the last directory you were in, use: This command … Read more
Avoid common pitfalls in Linux administration by following these practical tips. Learn how to handle permissions, troubleshoot errors, and secure your system effectively. 1. Avoid Running Commands That Change Multiple Properties Instead of running commands that change a large number of properties, focus on specific files or directories related to the issue you are troubleshooting. … Read more
awk is a versatile text-processing tool used to manipulate and analyze data in text files. It is especially useful for tasks like pattern scanning, extracting data, and generating reports. This guide introduces the basics of awk and provides practical examples to help you get started. Introduction to awk awk is a scripting language designed for text processing and data extraction. … Read more
Discover how to use strace to diagnose and resolve application issues in Linux environments. This powerful tool provides detailed insights into system calls, helping developers, system administrators, and support engineers troubleshoot performance bottlenecks, crashes, and network problems effectively. What is strace? strace is a diagnostic, debugging, and instructional utility for Linux. It intercepts and records the system calls … Read more