How to Not-Mess-Up Production
summary
Deploy steps and real commands that break things: a mistaken chmod /usr breaks sudo and forces an OS reinstall, running chmod root on a CentOS CyberPanel VM crashes the server, and three careless select queries on MySQL explode response times by skipping indexes and inflating network and deserialization cost. A Docker .env pushed to a public Git repo leaks secrets and triggers key rotation. Recovery relied on a documented shell script to rebuild and on IAM/RBAC/ABAC plus MFA to prevent repeat mistakes.
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