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LVM Thin Provisioning and Thin Snapshots in Practice

LVM Thin Provisioning and Thin Snapshots in Practice

Build an LVM thin pool, cut thin snapshots and clones, wire dmeventd autoextend, and recover pool metadata when thin_check flags a problem.

admin admin 2026-09-11
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RAID Levels, Parity and the Write Hole Explained

RAID Levels, Parity and the Write Hole Explained

RAID 0/1/5/6/10 in practice, why RAID 5 rebuilds are risky, what the parity write hole is, and how the Linux md write journal closes it.

admin admin 2026-09-11
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Linux Network Tuning with sysctl: TCP Buffers and Backlogs

Linux Network Tuning with sysctl: TCP Buffers and Backlogs

Tune Linux networking with sysctl: TCP buffers sized to the bandwidth-delay product, listen backlog, conntrack limits, validation method and rollback

admin admin 2026-09-10
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Oxidized Network Configuration Backup: Install and Configure

Oxidized Network Configuration Backup: Install and Configure

Deploy Oxidized for network configuration backup: install on Debian/RHEL, router.db inventory, Git output with hooks, verification, restore and securi

admin admin 2026-09-10
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FRRouting BGP on Linux: eBGP and iBGP Configuration

FRRouting BGP on Linux: eBGP and iBGP Configuration

FRRouting BGP on Linux: enable bgpd, configure eBGP and iBGP in vtysh, filter with prefix-lists and AS-PATH lists, verify and persist config.

admin admin 2026-09-09
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BIND9 Authoritative DNS Server: Zone Configuration Guide

BIND9 Authoritative DNS Server: Zone Configuration Guide

Run an authoritative-only BIND9 server: harden global options, declare forward and reverse zones, validate with named-checkzone and verify answers wit

admin admin 2026-09-09
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ISC DHCP Server on Linux: dhcpd.conf Configuration Guide

ISC DHCP Server on Linux: dhcpd.conf Configuration Guide

Run ISC DHCP on Linux: install and bind dhcpd, build dhcpd.conf global, subnet, pool and host scopes, add PXE, NTP and DDNS options, failover and Kea

admin admin 2026-09-09
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nmcli Guide: Static IP with NetworkManager Connections

nmcli Guide: Static IP with NetworkManager Connections

Configure a static IP, gateway, DNS and routes with nmcli on RHEL, Fedora, Rocky and AlmaLinux: connection modify, connection up and verification.

admin admin 2026-09-09
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Linux VXLAN Configuration: ip link and Static VTEP Setup

Linux VXLAN Configuration: ip link and Static VTEP Setup

Create Linux VXLAN tunnels with ip link: vxlan id, dstport 4789, multicast group or static remote VTEP, FDB management, bridging, MTU and troubleshoot

admin admin 2026-09-09
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rsyslog Central Log Server: Receive and Forward Logs

rsyslog Central Log Server: Receive and Forward Logs

Build an rsyslog central log server: enable UDP/TCP reception, store logs per host, forward clients with @@, and add queues, TLS and logrotate.

admin admin 2026-09-09
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