Linux Administration in Datacenters
Linux administration in datacenters combines system operations, security hardening, fleet management, and incident response.
Core operational domains
- Service lifecycle and boot management with systemd.
- Remote access and host administration with OpenSSH.
- Time synchronization with chrony.
- Centralized logging and troubleshooting with rsyslog.
Security and compliance
- Host firewalls and packet filtering with nftables.
- Authentication controls and brute-force protection with fail2ban.
- Mandatory access control with SELinux or AppArmor.
- Audit trails and forensic telemetry with auditd.
Detection and hardening
- Configuration and security auditing with Lynis.
- Endpoint telemetry and query-based investigations with osquery.
- Threat response and security operations with Wazuh and CrowdSec.