Server Setup & Stack Provisioning
Custom deployment and hardening of Linux stacks (LAMP/LEMP). Includes installing PHP, Nginx/Apache, tuning MySQL config allocations, installing Redis/Memcached object caching, and adjusting fail2ban/ufw firewalls.
Execution SOP & Action Plan
Every emergency intervention follows a strict sequence of diagnostics, mitigation checkpoints, and verification tasks to guarantee stability and prevent regressions:
1. OS Hardening & User Setup
Provision fresh Ubuntu/Debian VPS; disable root SSH login; create sudo user; configure UFW firewall (allow 22/80/443); install fail2ban.
2. LEMP/LAMP Stack Install
Install Nginx/Apache, PHP (target version), MySQL/MariaDB; configure php.ini (memory_limit, upload_max_filesize); tune my.cnf buffer pool.
3. Application Environment Setup
Install Composer, Node.js, Redis, Certbot; create virtual host config; set correct file permissions (www-data); deploy .env and run migrations.
4. Stack Validation & Load Test
Verify phpinfo() meets requirements; run ab or wrk basic load test; confirm Nginx/Apache returns 200; set up logrotate for all logs.
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