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Longest Palindrome Substring in a String in Java — step-by-step Programming tutorial on Progressive Robot

Longest Palindrome Substring in a String in Java

URL: https://www.progressiverobot.com/longest-palindrome-substring-string-java/ Longest palindrome substring in a string is a very common [java interview question](/community/tutorials/java-interview-questions). To find out the longest palindrome in [String](/community/tutorials/java-string), first of all, we need to identify the logic to do it. Longest Palindrome Substring in a String Algorithm The key point here is that from the mid of any palindrome string […]

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How To Upgrade to Ubuntu 20.04 Focal Fossa — step-by-step Linux tutorial on Progressive Robot

How To Upgrade to Ubuntu 20.04 Focal Fossa

The Ubuntu operating system’s latest Long Term Support (LTS) release, Ubuntu 20.04 (Focal Fossa), was released on April 23, 2020. This guide will explain how to upgrade an Ubuntu system of version 18.04 or later to Ubuntu 20.04.

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How to Set Up FluxCD on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up FluxCD on Oracle Linux 8

Introduction How to Set Up FluxCD on Oracle Linux 8 on Oracle Linux 8 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is […]

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How To Install Linux, Apache, MySQL, PHP (LAMP) stack on Arch Linux — step-by-step Linux tutorial on Progressive Robot

How To Install Linux, Apache, MySQL, PHP (LAMP) stack on Arch Linux

This tutorial explains how to install Apache, how to install MySQL, how to change the root MySQL password, how to install PHP, and how to see what libraries are available. LAMP stack is a group of open source software used to get web servers up and running. The acronym stands for Linux, Apache (the web server), MySQL (the database), and PHP (the language). This tutorial is written for Arch Linux.

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Oracle Linux 8 — thunderbird — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — thunderbird — vulnerability — patch and remediation guide (ELSA-2020-0127)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-0127 Related CVEs: CVE-2019-17022 CVE-2019-17017 CVE-2019-17016 CVE-2019-17026 CVE-2019-17024 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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Android Custom Action Bar Example Tutorial — step-by-step DevOps tutorial on Progressive Robot

Android Custom Action Bar Example Tutorial

In this tutorial we will create an app that consists of Android Custom Action Bar with a custom layout. We assume that you have a basic understanding of the ActionBar component discussed in [this tutorial](/community/tutorials/android-actionbar-example-tutorial). Android Custom Action Bar To customise an ActionBar first we need to configure the Theme in the res/values/styles.xml and set […]

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How to Set Up Grafana Alerting and Notification Channels on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up Grafana Alerting and Notification Channels on RHEL 8

Grafana 10 ships with a completely redesigned unified alerting engine that replaces the older panel-level alerts, offering multi-dimensional alert rules, flexible notification policies, and first-class support for external notification channels including Slack, email, and PagerDuty. Rather than binding an alert to a single dashboard panel, unified alerting lets you define alert rules independently against any […]

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