SUMMARY

• System engineer offering 9 - 10 years of Linux system administration and Engineering.
• FreeIPA users for centralized user provisioning & management.
• Virtualization with vmWare and KVM
• Support RHEL 6 and 7 infrastructures
• Red Hat Satellite 6 (updates, troubleshoot, remote job scheduling, and remote commands)
• Active Directory integration with Linux systems for centralized users, groups and server access.
• Perform software installation, upgrades/patches, troubleshooting, and maintenance on Linux, UNIX servers as well as troubleshooting tickets for Linux,
• Ansible modules, playbooks and tasks for centralized configuration, service, package management and troubleshooting

PROFESSIONAL EXPERIENCE

Confidential

Senior Linux Engineer

Responsibilities:

• Run system updates in using collections is Red Hat Satellite 6
• Set up logrotate
• Cron jobs to clean up directories
• Run remote commands with Red Hat Satellite 6
• Troiubleshoot systems using Red Hat Satellite 6
• Run remote jobs through Red Hat Satellite (Patching, reboots, check newest kernel after reboots)
• Operating system installations on bare metal using cd’s and on virtual machines using ISO files
• Perform Operating system patches
• Configure NFSv3 and NFSv4 server to provide ReadOnly access to its exports using Kerberos
• Mount NFS shares persistently (fstab) across reboots
• Configure backups to NFS location using REAR and NFSv4
• Set firewall rules to allow needed services such as SSH, NTP, rsyslog and NFS HTTPS
• Firewalld and iptables configurations and changes as necessary
• Use bare metal servers to install VMware
• Use Ansible ad-hoc commands on RHEL 6 and 7 and CentOS 6 and 7 syetems
• Configure samba shares between Linux machines and workstations
• Remediation for findings after security scans
• Write ansible playbooks to update packages and systems
• Ansible roles and tasks to replace tools such as ossec with wazuh
• Ansible playbooks to push configuration files to systems based on group inventories
• Wrtie Ansible playbooks to maintina latest packages and keep services running for RHEL 6 and 7 systems
• Server hardening for both physical/bare metal and virtual machines based on RHEL 7
• Install virtual machines on VMware virtualization environment
• Zabbix monitoring of Linux systems, switches and routers
• Create custom monitoring of URLs with Zabbix
• Build authentication server using FreeIPA
• Configure LDAP for centralized user provisioning
• Mount file systems locally and remote on Oracle Enterprise Linux
• Package management using Red Hat Satellite and Spacewalk. Yum and RPM
• Install updates for servers using yum
• Remote logging setup (rsyslog) and log watch
• Troubleshooting
• Server availability issues
• User access issues
• Network share connectivity issues (NFSv3 and NFSv4)
• Persistent file systems
• Customer requests
• Linux Server provisioning
• Adding and/or increasing hard drive and memory capacity
• Unlock accounts that have been locked by fail lock
• Provide monitoring status of servers in Zabbix

Confidential

Linux System Administrator

Responsibilities:

• Red Hat Satellite
• Provisioning systems through satellite and VMware
• Run system updates
• Register systems to satellite
• Red Hat CloudForms (Attended Red Hat CloudForms Class)
• Provision systems through Satellite and Vmware
• Create zones
• Red Hat Enterprise Linux
• System config, provisioning, troubleshooting user login issues,
• Registering systems to satellite
• Add users and groups to Oracle Directory Server Enterprise Edition
• Update passwords monthly for local accounts
• Adding space to systems (virtual hard drives and LVM)
• Write ansible playbooks to update packages
• Wrtie Ansible playbooks to maintina latest packages and keep services running for RHEL 6 and 7 systems
• Server hardening for both physical/bare metal and virtual machines based on RHEL 7
• Troubleshoot Oracle Enterprise Linux connectivity issues
• Mount NFS shares on Oracle Enterprise Linux systems
• Clone GIT repositories to Linux systems for developers and database administrators
• Use Ansible to send remote commands to systems and run yum update
• Systems maintenance. Kernel updates and other patches
• Registered systems to puppet for code to be pushed by developers
• Troubleshoot user login failures and server inaccessibility
• OpenScap vulnerability scans (Scap scans)
• Integration with Active Directory and troubleshooting user access issues
• Join Red Hat systems to Active Directory
• Change/update firewall settings using iptables and firewalld
• Create, turn on/off SELinux policies as required by security and functionality
• Perform logwatch and checks
• Configure remote logging for systems for redundancy of log files
• File shares
• Configure and troubleshoot samba shares
• Set up NFS server to share files and directories across similar virtual machines for NFSv3 and NFSv4 using krb (Kerberos)
• Set up NFS clients to mount shared exports with NFSv3 and NFSv4 using krb (Kerberos)
• Monitoring/Tickets
• Create alerts for systems in VMware using vROPs
• Use Zabbix to monitor Linux systems and switches
• Remedy ticketing system
• Use JIRA for issue tracking

Confidential

Linux System Administrator

Responsibilities:

• Spacewalk 2.4, spacewalk 2.6 (open source for Red Hat Satellite)
• Update, Config Management, continuous monitoring to justify changes in configuration files and reason for change, etc.
• KVM
• Install Linux on bare metal server and configure it for Kernel Virtual Machine (KVM)
• Install Linux and configure the operating system for java and C++ developers to compile their code
• Rear backups through NFS
• Server hardening as required by DoD (Department of Defense)
• Implement and monitor STIGs (Security Technical Implementation Guide)
• Familiarity with RMF
• Mount NFS shares persistently (fstab) across reboots
• Configure backups to NFS location using REAR and NFSv4
• Configure NFS to only allow certain subnets and with Kerberos
• Backup bare metal servers using external hard drives and LUKS for security
• Configure RAID on bare metal servers for redundancy and reliability
• OpenScap vulnerability scans (Scap scans), for both physical and virtual machines
• Zabbix, Nagios for monitoring
• Monitor URLs with Zabbix
• Active Directory integration with Linux systems for users, groups and server access
• Add users and groups to Active Directory with Posix to access Linux systems
• FreeIPA server and client configuration
• Audit and archive logs
• Use Ansible to install packages on remote systems and run remote commands
• Perform software installation, upgrades/patches, troubleshooting, and maintenance on UNIX servers.
• Responsible for maintaining system logs for unauthorized root usage and access
• User account management, autofs of home directories.
• Add users, groups in Linux IPA server
• Implement and document systems for production environment.
• Monitor, troubleshoot, and resolve issues involving operating systems in Red Hat Enterprise Linux, CentOS
• Introduce new servers on the network, while maintaining and troubleshooting network connectivity.
• Install, support, and maintain servers using interactive methods and kickstart
• Configure, monitor, and maintain Solaris and Linux servers, evaluate needs and installed appropriate patches as needed.
• Replace failed hard drives on raided systems
• Antivirus installation and daily scan for viruses
• Internal repository server
• Perform log watch and daily checks
• Install software packages as required by developers using yum and installing from source.