Summary
Overview
Work History
Education
Skills
Certification
Timeline
Generic

Ferdous Chowdhury

Bronx,NY

Summary

Highly motivated Linux Administrator with a strong background in a wide variety of system support and solutions-based IT services for Linux, and basic Windows administration. Seeking a Linux Administrator position in a goal-oriented IT environment that will utilize my existing education, hands-on skills, and experience to achieve the organization’s objectives.

Overview

6
6
years of professional experience
1
1
Certification

Work History

Redhat Administrator

NextGen Data Cloud Solutions
10.2020 - Current
  • Experience in installing, configuring, and patching RedHat Enterprise Linux, as well as maintenance and system administration.
  • Publishing new versions and Promoting Channels in RedHat Satellite.
  • Reading Grafana monitoring reports and Unitrends backup report.
  • Build new servers and decommission old servers (virtual in VMware vSphere and physical in HP OneView).
  • Great at using Linux basics, day-to-day commands.
  • Handling users' issues due to permission, ownership, ACLs, setgid, and stick bits.
  • Setting up umask based on requirements.
  • Conducting data migration between systems.
  • Archiving and compressing data.
  • User management: creation, password management, removal, and AD groups.
  • Copying Sudoers rules to newly built servers.
  • Make configuration changes, and follow the change request process.
  • Communication with team members and the Application team for the project and resolving issues.
  • Investigating issues when services stop running, and reading logs under /var/log.
  • Setting up new filesystems (partition, LVM, and NFS).
  • Adding servers to backup schedules on Unitrends
  • Running scripts, Ansible playbooks, and creating automated tasks with crontab.
  • Containerized applications using Docker, and managed deployments with Kubernetes, for streamlined scalability and environment consistency.
  • Configured SELinux policies to manage access controls and secure services.
  • Managed system performance using tools like top, htop, vmstat, and iotop.
  • Performed kernel upgrades and tuning for performance and stability improvements.
  • Used tcpdump and netstat for network troubleshooting and packet capture analysis.
  • Automated server health checks and system reporting using shell scripts and cron jobs.
  • Performed OS-level hardening by disabling unused services, enforcing password policies, and securing SSH access.
  • Configured firewalls using firewalld and iptables for service access control.
  • Built and maintained custom RPM packages and YUM repositories for internal distribution.
  • Performed Leap upgrades of Linux servers to ensure systems remained on supported versions with minimal downtime, following best practices for pre-upgrade checks, testing, and rollback planning.
  • Participate in on-call rotation
  • Hardened Linux systems by enforcing file permissions, auditing sudo access, and disabling unused services.
  • Monitored logs (/var/log, auditd, rsyslog) for suspicious activity, and investigated unauthorized access attempts.
  • Implemented SSH security controls, including key-based authentication, root login restrictions, and custom ports.
  • Used auditd and AIDE to monitor file integrity and system activity for unauthorized changes.
  • Applied security patches and verified compliance with security baselines (e.g., CIS Benchmarks).

Help Desk 2

Brooklyn Hospital Center
NY
01.2020 - 10.2020
  • Ran network cables, Cat5, from the patch panel and network jacks.
  • Monitored workstations and servers on a cloud platform.
  • Backed up data for workstations and servers, troubleshooting Windows errors.
  • Daily use of GFI, ConnectWise, TeamViewer, Office 365, Managed Online Backup, and Webroot.
  • Antivirus Anywhere software on Windows Server '03, '08, '12. And Windows OS 98, Vista, XP, and 7.
  • Building Windows and Linux servers (physical HP server) and Linux GUI workstations from built images.

Education

Bachelor of Science -

City College Of New York

Skills

  • Operating System - RHEL 5x, 6x, 7x, 8x, CentOS 5x, 6x, 7x, Windows 7, 8, 10, Windows Server 2008
  • Hardware - HP ProLiant G7, G8, G9, G10
  • Software, applications, and tools - Ansible, VMware Exsi 70, MobaXterm, PowerShell, Redhat Satellite, Grafana, Unitrends, Docker, and ServiceNow
  • Languages: Shell scripting, Bash, YML
  • Networking - TCP/IP, NIS, NFS, DNS, DHCP, LAN, FTP/TFTP, SSH, SFTP
  • Storage - LVM, SCSI, SATA, Ext4, XFS, SAN, NFS, RAID (0/1/5)

Certification

  • CompTIA Security+
  • CompTIA Network+
  • CompTIA Linux+
  • CompTIA CySA+ (In Progress)

Timeline

Redhat Administrator

NextGen Data Cloud Solutions
10.2020 - Current

Help Desk 2

Brooklyn Hospital Center
01.2020 - 10.2020

Bachelor of Science -

City College Of New York

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Ferdous Chowdhury