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243 launch guides · 2601 reviewed steps
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Security · System Administration

Build a private CA with OpenSSL and issue service certificates

Create an offline root and constrained online intermediate with OpenSSL 3.5 LTS, issue inventory-approved SAN/EKU service leaves, operate revocation, and prove rotation plus full CA recovery.
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danger360 minadvanced17 stepsOpenSSL

Databases & Data · High Availability & Reliability · Security

Build a MongoDB replica set and verify failover safely

Harden an existing three-member MongoDB 8.2 replica set, prove majority durability and client discovery, perform a planned election and bounded secondary outage, and reconcile real application-level evidence.
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danger150 minadvanced14 stepsMongoDB Community Server

Databases & Data · Security · High Availability & Reliability

Install and secure MongoDB with authentication, TLS and backups

Deploy a three-member MongoDB Community Server 8.2 replica set on Ubuntu 24.04 with TLS/X.509 member identity, SCRAM least privilege, majority-aware clients and a full mongodump/oplog isolated restore drill.
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danger300 minadvanced11 stepsMongoDB Community Server

Security · Databases & Data

Configure hostname-verifying TLS for MySQL and MariaDB clients

Issue identities from a trusted CA, protect private keys, require encrypted accounts, configure hostname verification, rotate certificates, and test downgrade resistance.
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caution70 minadvanced8 stepsMySQL