WebTech360 Tips - Tech Guides & Tutorials | Page 56

Clear Nextcloud’s missing database indexes warning with the official occ command. Back up first, preview changes, run the repair, and verify the result.

Learn VLOOKUP and XLOOKUP in LibreOffice Calc, including exact matches, left lookups, not-found results, reverse search, INDEX/MATCH alternatives, and common errors.

Configure Keycloak SSO for Element Web by connecting OIDC to Synapse, setting the exact callback URL, mapping user claims, and testing logout.

Troubleshoot Collabora Online WOPI proof validation failures by checking discovery keys, key rotation, proxy URLs, timestamps, and host allow-lists.

Enable Track Changes for everyone in an ONLYOFFICE document, keep it active after reopening, and understand the limits of a global default.

Learn how to diagnose and fix Zimbra startup failures caused by an unresponsive LDAP server, including service checks, DNS, ports, certificates, LDAP URLs, and recovery validation.

Enable kernel live patching on SLES 15 SP7, apply supported fixes without rebooting, verify active patches, and understand when a kernel restart is still required.

Enable FIPS mode on SLES 15 with SUSE’s supported setup utility, reboot safely, verify kernel and crypto policy status, and check certification limits.

Configure S3-compatible object storage for ownCloud Infinite Scale using the s3ng driver, POSIX metadata, bucket policy, validation, and safe production checks.

Compare Collabora Online’s per-view, out-of-focus, document-idle, autosave, and proxy timeouts, then choose and verify settings for your deployment.

Learn how to inspect a Zimbra Postfix backlog, identify deferred versus held mail, run a safe queue flush, and verify progress without deleting messages.

Install Google Chrome on Gooroom OS safely with official .deb packages, APT, policy checks, update guidance, and fixes for managed devices.

Configure Z-Push with Kopano for secure ActiveSync email, contacts, calendar, and task sync. Compare backend and deployment choices, then verify mobile setup.

Troubleshoot Jitsi Meet disconnects with a practical checklist for browsers, mobile devices, unstable networks, firewalls, and self-hosted servers.

Troubleshoot Nextcloud Talk call quality, configure coturn, open the right ports, test ICE candidates, and decide when TURN or HPB is the right fix.

Fix an ONLYOFFICE spell-check language that will not change. Learn when to set the document language, select text, adjust Desktop Editors detection, and check dictionaries.

Deploy Element Web on Nginx with a custom homeserver, HTTPS, caching and security headers, plus simple checks for common setup problems.

Securely forward SLES system logs to a remote syslog server with rsyslog, TLS certificates, peer-name verification, queues, validation, and testing.

Restore missing Calibri and Arial in LibreOffice by checking your system fonts, installing licensed fonts or compatible substitutes, refreshing the font cache, and verifying Writer output.

Fix BigBlueButton’s “Unsupported File Type” presentation error by checking the file extension, exporting a real PDF, testing another file, and identifying when to contact an administrator.

Back up and restore Collabora CODE configuration files on native or Docker installs, including coolwsd.xml, deployment settings, proof keys, and validation.

Resolve Matrix Synapse “Too many open files” errors by checking the service limit, applying a systemd override, and verifying the running process.

Join SLES 15 to Active Directory with SSSD using YaST. Prepare DNS and time, configure domain logins, verify Kerberos, and compare SSSD, Winbind, and realmd.

Set up Nextcloud full text search with Elasticsearch 8, install the required apps, configure the index, run the first crawl, and verify search results.

Learn two reliable ways to import MBOX files into Thunderbird 115 Supernova: use a compatible ImportExportTools NG release or copy a mailbox into Local Folders safely.

Fix RTL8821CE Wi-Fi on Pardus Linux by checking the built-in rtw88 driver, Realtek firmware, rfkill, NetworkManager, and safe fallback options.

Diagnose and fix Debian 12 DNS resolution failures with systemd-resolved, including resolv.conf, NetworkManager, networkd, cache, and verification.

Build a Matrix bot with Python and Simple-Matrix-Bot-Lib, compare authentication and deployment options, test commands, and understand when to use matrix-nio instead.

Install Pardus 25.2 beside Windows 11 by backing up, shrinking the Windows volume, booting a UEFI USB, and protecting the existing EFI and recovery partitions.

Install Jitsi Meet on Ubuntu 24.04 with DNS, firewall rules, official repositories, Let’s Encrypt SSL, service checks, and NAT troubleshooting.