Linux System Administration
Expert Linux administration, performance tuning, and enterprise-grade infrastructure management
Master your Linux infrastructure with 20+ years of production experience managing enterprise systems. I specialize in high-performance Linux environments across RedHat/Rocky/AlmaLinux, Debian/Ubuntu, and custom distributions, optimizing every layer from kernel tuning to application performance. My expertise includes building 99.99% uptime clusters, implementing automated system management at scale, and architecting resilient infrastructure that handles millions of requests daily.
I deliver complete system automation using Ansible, Puppet, and custom scripts, ensuring consistent configurations across hundreds of servers. My performance tuning expertise covers kernel optimization (sysctl, scheduling, memory management), storage optimization (LVM, RAID, filesystem tuning), network performance (TCP/IP stack optimization, eBPF), and application-level optimizations. I implement high availability clusters with Pacemaker/Corosync, DRBD replication, and load balancing using HAProxy and Nginx.
Whether you need enterprise system hardening, disaster recovery planning, or infrastructure modernization, I provide battle-tested solutions. From bare metal to cloud (AWS, GCP, Azure), I architect Linux environments that are secure, performant, and maintainable. My approach combines deep technical knowledge with operational excellence, delivering systems that just work.
Performance Tuning & Optimization
- Kernel tuning (sysctl, CPU scheduling, memory management, I/O)
- Storage optimization with LVM, RAID, filesystem tuning (ext4, XFS, Btrfs)
- Network performance optimization (TCP/IP stack, eBPF, XDP)
- Application profiling and bottleneck identification (perf, strace, eBPF)
High Availability & Clustering
- Pacemaker/Corosync clusters for 99.99% uptime
- DRBD for real-time block device replication
- HAProxy & Nginx load balancing and reverse proxy
- GlusterFS, Ceph for distributed storage
Automation & Configuration Management
- Ansible playbooks for infrastructure automation
- Puppet/Chef for large-scale configuration management
- Custom Bash/Python scripts for specific automation tasks
- Systemd service management and custom unit files
Security Hardening
- SELinux/AppArmor mandatory access control implementation
- Firewall configuration (iptables, nftables, firewalld)
- CIS benchmarks compliance and security auditing
- Patch management and vulnerability remediation
Monitoring & Observability
- Prometheus & Node Exporter for metrics collection
- Grafana dashboards for system visualization
- Centralized logging (rsyslog, journald, ELK stack)
- Alerting systems (Nagios, Zabbix, Prometheus Alertmanager)
Backup & Disaster Recovery
- Backup strategies (rsync, Bacula, Restic, duplicity)
- Snapshot management (LVM, Btrfs, ZFS snapshots)
- Disaster recovery planning and failover testing
- Off-site backups to cloud (S3, Azure Blob, GCS)
Linux System Administration Tools & Technologies
Linux Distributions
System Tools
Security & Monitoring
Storage & Filesystems
Business Impact of Expert Linux Administration
Achieve 99.99% uptime with high availability clusters and failover
Reduce infrastructure costs by 30-50% through performance optimization
Automate repetitive tasks saving 20+ hours per week for your team
Harden systems against security threats with enterprise-grade protection
Improve application performance by up to 300% with kernel tuning
Ensure business continuity with robust backup and disaster recovery plans