Package Management

How to Configure DNSSEC Validation on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure DNSSEC Validation on Debian 10

Introduction Deploying configure dnssec validation on debian 10 on a Debian 10 Buster machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Ensure Debian 10 […]

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How to Harden Shared Memory on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Harden Shared Memory on Debian 10

Introduction This guide explains how to Harden Shared Memory on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with the standard […]

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How to Configure OpenSCAP Security Compliance on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure OpenSCAP Security Compliance on Debian 10

Introduction How to Configure OpenSCAP Security Compliance on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 10. […]

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How to Monitor Disk Usage with df, du, lsblk and ncdu on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Monitor Disk Usage with df, du, lsblk and ncdu on RHEL 7

How to Monitor Disk Usage with df, du, lsblk and ncdu on RHEL 7 Running out of disk space is one of the most disruptive events in a production Linux environment — it can crash databases, halt web servers, and fill system logs with errors. Proactive disk usage monitoring is therefore a non-negotiable part of […]

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How to Set Up Yubikey Authentication on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up Yubikey Authentication on Debian 10

Introduction How to Set Up Yubikey Authentication on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 10. […]

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How to Schedule Automated Tasks with cron and anacron on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Schedule Automated Tasks with cron and anacron on RHEL 7

How to Schedule Automated Tasks with cron and anacron on RHEL 7 Automation is at the heart of effective Linux system administration. Red Hat Enterprise Linux 7 provides two complementary scheduling systems: cron for tasks that need to run at precise times on continuously running servers, and anacron for tasks that must eventually run on […]

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How to Configure ACLs on Ext4 File Systems on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure ACLs on Ext4 File Systems on Debian 10

Introduction How to Configure ACLs on Ext4 File Systems on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from […]

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How to Configure Snort Network Intrusion Detection on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure Snort Network Intrusion Detection on Debian 10

Introduction How to Configure Snort Network Intrusion Detection on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian […]

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How to Use rsync for Efficient File Synchronisation on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Use rsync for Efficient File Synchronisation on RHEL 7

How to Use rsync for Efficient File Synchronisation on RHEL 7 The rsync utility is the de facto standard for file synchronisation on Linux. Unlike a simple cp or scp, rsync transfers only the differences between source and destination, making it extraordinarily efficient for large datasets and incremental backups. On Red Hat Enterprise Linux 7, […]

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How to Set Up Suricata IDS/IPS on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up Suricata IDS/IPS on Debian 10

Introduction This guide explains how to Set Up Suricata IDS/IPS on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with the […]

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