Stephen Vaughan Email & Phone Number

* Strengths- Extensive experience in tuning, optimizing, securing Linux environments - Tack-sharp investigative RCA and troubleshooting- Event correlation- Hosting and datacenter environments* Experience- 9+ years Linux Systems- Debian, Red hat EL, CentOS- Virtualization and cloud computing- Global OS master volume management, optimization and tuning- 10G ethernet- High-availability- Multi-OS environment of over 7,000 systems- Hosting environments spanning multiple continents- Netapp storage and NFS- Chef- Infoblox- Vmware vCenter, ESXi, vCenter Orchestrator, vSphere CLI, Redhat Xen* Linux Specific- RHEL5 and RHEL6- Strong understanding of system resources; CPU (user/sys), memory (virtual, cached, etc), Storage (I/O)- In-depth knowledge of systems tuning and optimization around sysctl (virtual memory, network stack, and file systems)- Strong knowledge of NFS w/ diskless virtual machines, including optimization and troubleshooting of the NFS layer- Extensive troubleshooting experience, through tools such as sysstat, atop and core Linux indicators; vmstat, iostat, top, slabinfo- Interface bonding and high-availability, vlans, iproute2, iptables- Strong knowledge of DNS, SMTP/MTA and other mail related services through multiple daemons

Listed skills include Linux, Debian, Redhat, Shell Scripting, and 42 others.