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Sr. Linux System Administrator Resume

SUMMARY

  • Over 8+ years of experience specialized in System Administration working on Red hatLinux, Solaris, Suse Linux AIX, Cent OS and Windows environments.
  • Experience in Installing, upgrading and configuring Red HatLinux 5.x, 6.x, 7.x using Kickstart Servers and Interactive Installation.
  • Experience in administering UNIX&Linux. Experience in Installation, Configuration, Backup, Recovery, Maintenance, Support of UNIX& Linux Servers.
  • Experience maintaining virtual server environment using VMWARE ESXi, VSphere and VCenter.
  • Experience on AWS building out EC2 instances & working to set up IAM policies to integrate AD.
  • Experience on provisioning, allocating the storage toLinuxand windows instances and doing other security relevant configuration in these instances.
  • Experience installing, configuring, administrating, troubleshooting, tuning, security, backup/recovery and upgrading Linux(Red Hat & SuSE) in large environments.
  • Experience performing LVM tasks like creating Physical volumes, Volume groups, Logical Volumes and file system.
  • Managing and Monitoring the JVM performance by WebSphere Heap Size, garbage collection.
  • Extensive experience in Shell scripting using Shell, Bash, Python.
  • Experience in transferring files securely Via the Network tools, rsync, SCP, winscp, ftp.
  • Experience installing and updating packages from the network, Remote Repository, or Local File system.
  • Experienced working with Infoblox and adding CNAME records in DHCP pool as well as keeping storage counts.
  • Datacenter Operations including hardware, software setup monitoring and troubleshooting.
  • Good exposure to Storage Solutions like SAN, NAS.
  • Application Deployments & Environment configuration using automation tools such as Puppet, Chef and Ansible using GIT as version control.
  • Experience in DevOps for designing and architecting solutions for Software Configuration Management (Build, Release and Deployment Management, CI/CD, Application Environment Management) and Incident Management.
  • Experience as a Build and Release Engineering in automating, building, deploying, and releasing of code from one environment to another environment.

TECHNICAL SKILLS

Operating System: Windows, Ubuntu, UNIX, AWS, RHEL, OEL, Fedora, CentOS SUSE

Versioning Tools: GIT, Subversion (SVN), Clear case, CVS, CA Harvest and

Team Foundation Server (TFS):

Build Tools: VMware - VRO, AWS, Docker, Chef, Puppet, Ansible & Salt

CI/CD Tools: Jenkins

Languages: Shell, BASH, Python

Ticketing Tools: Atlassian-JIRA, Remedy, ITSM, Service Now, Clarity

Web Technologies: Servlets, HTML, XML, JSON

Storage: SAN, EMC Symmetrix / Clarion, iSCSI, SNAP, NAS, DAS

Web servers: Web logic, Web Sphere, Apache Tomcat, JBOSS.

RDBMS: Oracle, MYSQL, DB2

Hardware: Dell R440, R770xd, HP ProLiant DL 380 G7/G8&G9, HP C- 7000, BL 460 G6/7, Cisco UCS, IBM

Virtualization: VMware ESX6 server, VMware Workstation, VIO

PROFESSIONAL EXPERIENCE

Sr. Linux System Administrator

Confidential

Responsibilities:

  • Administrated Linux cluster consisting of 128 nodes running both on Red hat and Suse
  • Added new nodes to the cluster, updated the nodes with patches from RHN and satellite server.
  • Configuring servers and setting up File systems, managing Disks space, and space clean up as required, clean setting up and troubleshooting networks issues like NFS/DNS/DHCP.
  • Managed Disk using LVM, resized disk space and Managed disk space from NetApp filers.
  • Troubleshooting system - OS level and Hardware level.
  • Worked on NTP server setup and synchronized clients with NTP server.
  • Administrated system logs and security logs, Performed Kernel tuning and kernel patching.
  • Managed Remedy Queue to assign tickets according to level of expertise required and resolved the cases to resolution for cases whose ownership is taken.
  • Working on FTP, SAMBA and NFS related issues.
  • Configured the servers and clients with Veritas Netbackup and monitoring Jobs & Activities.
  • Performed backup, Archive and restore operations using Veritas Netbackup tool on servers.
  • Day to day administration of Production, QA, Development and Test environment systems.
  • Refresh/copy databases using UNIX commands & scripts (ART-tool using DD command son backend) every quarter on stage and development servers from respective DR of that Data Base.
  • Re-fired Backups, modifying backup config file (implementing various changes advised by DBA) and solving various backup related issues on DBBS (Data base backup systems)
  • Created User id and adding the respective group storage to access the security servers depending on validation of justification from client.

Environment: Red Hat 5.x,6.x, FTP, Samba, Veritas, Netbackup, NTP, DHCP, LDAP, AD, Suse, File systems, VMWare ESXI 5.x,6.x, Troubleshooting, ACL.

Linux Administrator

Confidential

Responsibilities:

  • Administered, maintained Red Hat 3.0, 4.0, 5.0, 6.0 AS, ES, Troubleshooting Hardware, Operating System Application & Network problems and performance issues; Deployed latest patches for, Linux and Application servers, Performed Red Hat Linux Kernel Tuning.
  • Experience in implementing and configuring network services such as HTTP, DHCP, and TFTP.
  • Install and configure DHCP, DNS, web (Apache, IIS), mail (SMTP, IMAP, POP3), and file servers on Linux servers.
  • Administered Linux servers for several functions including managing Apache/Tomcat server, mail server, and MySQL databases in both development and production.
  • Bash shell-scripts to automate routine activities.
  • Migrated database applications from Windows 2000 Server to Linux server.
  • Installing and setting up Oracle9i on Linux for the development team.
  • Linux kernel, memory upgrades and swaps area.
  • Created users, manage user permissions; maintain User & File System quota on Red hat Linux.
  • Diagnosed hardware and software problems and provided solution to them.
  • Monitored trouble ticket queue to attend user and system calls.
  • Attended team meetings, change control meetings to update installation progress, and for upcoming changes in environment.
  • Updated data in inventory management package for Software and Hardware products.
  • Capacity Planning, Infrastructure design and ordering systems.
  • Worked with DBAs on installation of RDBMS database, restoration and log generation.

Environment: Linux(Red Hat 6.x, Centos), DNS, TCP/IP, Active Directory, Windows servers, Solaris, AIX.

Linux System Engineer

Confidential

Responsibilities:

  • Resolve customer problems by analyzing Remedy records, customer asset histories, trouble ticketing systems, and related documents.
  • Troubleshooting user logins using various remote login utilities and engaged users in constructive login best practice including inculcating strong password approaches
  • Implemented IP Table and ACL on Red Hat Linuxservers
  • Coordinated internal and external resources, other customer deliverables, local systems, other departments and workgroups to troubleshoot and resolve issues.
  • Server auditing, decommissioning of the servers including management of business unit requirements.
  • Troubleshoot/fixed NFS, TCP/IP, and Net Backup issues as needed.
  • Access Management, patching of server vulnerabilities and bug fixes.
  • Troubleshooting, diagnostics and fixing the network, hardware and software issues on Sun Fire and Enterprise Servers.
  • Responsible for Monitoring and fine-tuning system and network performance for Solaris systems.
  • Configuration and administration of DNS, LDAP, NFS, NIS, NIS+, Send mail and Web logic in Solaris and Linux.
  • Installed RHEL 5 and RHEL 6 and updated the versions within the release.
  • Installed, upgraded and configured Solaris 10/9/8, RHEL 6 /5.x, AIX. This included Jump Start Installation, Kick start Installation, NIM and CD media.
  • Extensive experience in Active Directory Domain Services.
  • Managing multiple Active Directory domain controllers, user accounts and DNS and DHCP services.

Environment: Linux(Red Hat 6.x, Centos, Ubuntu), Nagios, DNS, TCP/IP, Active Directory, Windows servers, Solaris, AIX, DHCP, High Availability, ACL, LVM, Boot Loader (Grub)

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