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Technical guides from real engineering practice: installation, integration, automation, troubleshooting and production operation of modern Linux and open-source platforms. The articles connect concrete configuration with architecture, security, lifecycle, monitoring and operations.

  • grommunio Web shows the target mailbox after single mailbox restore with two test mails.
    grommunio & Groupware

    grommunio disaster recovery and single mailbox restore

    Author:
    ForgeOneStamenography 17.
    Mathias Rumbold
    4 minutes read

    Part 11 of the grommunio 2026 series validates full DR and targeted mailbox restore in a real appliance lab.

    : grommunio disaster recovery and single mailbox restore
  • SUSE Multi-Linux Manager dashboard after the base installation.
    Enterprise Linux,  Linux Lifecycle Management

    SUSE Multi-Linux Manager 5.2: integrate SSO with Keycloak, SAML and MFA

    Author:
    ForgeOneStamenography 17.
    Mathias Rumbold
    10 minutes read

    Keycloak SAML SSO for SUSE Multi-Linux Manager: client, metadata, ACS, certificates, MFA, roles, break-glass and acceptance checks.

    : SUSE Multi-Linux Manager 5.2: integrate SSO with Keycloak, SAML and MFA
  • Product Catalog in SUSE Multi-Linux Manager 5.2.
    Enterprise Linux,  Linux Lifecycle Management

    SUSE Multi-Linux Manager 5.2: build proxies for sites and distributed Linux estates

    Author:
    ForgeOneStamenography 17.
    Mathias Rumbold
    9 minutes read

    Practical guide for SUSE Multi-Linux Manager proxies: architecture, channels, proxy host, bootstrap, client assignment, reports and acceptance checks.

    : SUSE Multi-Linux Manager 5.2: build proxies for sites and distributed Linux estates
  • grommunio Web ist vor dem Failover über die hs1-VIP erreichbar.
    grommunio & Groupware

    grommunio 2026 Cluster and High Availability: from multi-server lab to tested active/standby homeserver

    Author:
    ForgeOneStamenography 17.
    Mathias Rumbold
    17 minutes read

    Part 10 shows grommunio HA with DRBD, Pacemaker, Corosync, STONITH, witness, VIP and an active/standby homeserver.

    : grommunio 2026 Cluster and High Availability: from multi-server lab to tested active/standby homeserver
  • SUSE Multi-Linux Manager dashboard after the base installation.
    Enterprise Linux,  Linux Lifecycle Management

    SUSE Multi-Linux Manager 5.2: Use OpenSCAP, compliance and audit in production

    Author:
    ForgeOneStamenography 17.
    Mathias Rumbold
    9 minutes read

    Use OpenSCAP with SUSE Multi-Linux Manager 5.2 in production: prepare clients, select profiles, schedule scans, review results and control remediation.

    : SUSE Multi-Linux Manager 5.2: Use OpenSCAP, compliance and audit in production
  • grommunio Admin zeigt mehrere Organizations als zentrale Mandantenstruktur.
    grommunio & Groupware

    grommunio Multitenancy 2026: organizations, domains and multiple LDAP sources

    Author:
    ForgeOneStamenography 17.
    Mathias Rumbold
    9 minutes read

    Part 9 of the grommunio 2026 series classifies multitenancy realistically: organizations, domains, per-organization LDAP, admin boundaries, mail flow, GAL, calendar, MDM and MSP limits.

    : grommunio Multitenancy 2026: organizations, domains and multiple LDAP sources
  • Product Catalog in SUSE Multi-Linux Manager 5.2.
    Enterprise Linux,  Linux Lifecycle Management

    SUSE Multi-Linux Manager: manage mixed Linux

    Author:
    ForgeOneStamenography 17.
    Mathias Rumbold
    14 minutes read

    Operate heterogeneous Linux estates with SLES, SL Micro, Debian, Ubuntu, Rocky, Alma and Oracle Linux.

    : SUSE Multi-Linux Manager: manage mixed Linux
  • Relevant patches in SUSE Multi-Linux Manager.
    Enterprise Linux,  Linux Lifecycle Management

    SUSE Multi-Linux Manager: patch and lifecycle management

    Author:
    ForgeOneStamenography 17.
    Mathias Rumbold
    12 minutes read

    Relevant patches, staging, maintenance windows and CLM as a production update process.

    : SUSE Multi-Linux Manager: patch and lifecycle management
  • Product Catalog in SUSE Multi-Linux Manager 5.2.
    Enterprise Linux,  Linux Lifecycle Management

    SUSE Multi-Linux Manager: onboard first clients

    Author:
    ForgeOneStamenography 17.
    Mathias Rumbold
    14 minutes read

    Activation keys, bootstrap, Salt key and system list for the first managed SLES 16 client.

    : SUSE Multi-Linux Manager: onboard first clients
  • Login page of the SUSE Multi-Linux Manager web interface.
    Enterprise Linux,  Linux Lifecycle Management

    Install SUSE Multi-Linux Manager 5.2 for production

    Author:
    ForgeOneStamenography 17.
    Mathias Rumbold
    17 minutes read

    Practical guide for SUSE Multi-Linux Manager 5.2 on SL Micro 6.2: verify image, prepare appliance, configure storage, install with mgradm, connect SCC and sync the first channel.

    : Install SUSE Multi-Linux Manager 5.2 for production