System Engineer Tasks

 1–15: System Installation & Configuration

  1. Install RHEL operating systems (bare metal or virtual machines)
  2. Configure system time, locale, and hostname
  3. Set up user accounts, groups, and permissions
  4. Install and configure software packages using yum or dnf
  5. Configure system services and runlevels (systemd)
  6. Set up and manage partitions and logical volumes (LVM)
  7. Mount and manage file systems (ext4, XFS, NFS, etc.)
  8. Configure swap space
  9. Set kernel parameters using sysctl
  10. Register systems with Red Hat Subscription Manager
  11. Configure network interfaces and DNS settings
  12. Set static IPs and manage using nmcli or nmtui
  13. Manage system logs with rsyslog or journalctl
  14. Configure SELinux policies and modes
  15. Install and configure graphical environments (GNOME/KDE if needed)

🔒 16–25: Security & Access Control

  1. Configure firewalls using firewalld or iptables
  2. Set up SSH key-based authentication
  3. Harden system access (disable root SSH, change default ports)
  4. Audit system with tools like aide or auditd
  5. Configure sudoers for privilege escalation
  6. Apply and automate security patches
  7. Enforce password complexity and expiration policies
  8. Use chage, passwd, and faillock for account security
  9. Integrate with identity management solutions (FreeIPA, LDAP)
  10. Perform system hardening based on CIS or Red Hat benchmarks

🛠️ 26–35: System Maintenance & Troubleshooting

  1. Monitor system performance with tools like top, vmstat, iotop
  2. Troubleshoot boot issues with grub2, dracut, or rescue mode
  3. Diagnose system crashes and kernel panics
  4. Schedule regular maintenance tasks with cron and at
  5. Analyze and rotate logs using logrotate
  6. Use Red Hat Insights for proactive issue detection
  7. Monitor disk space usage and cleanup
  8. Run and interpret sar, dstat, or iostat reports
  9. Track file changes using inotify
  10. Investigate service failures with systemctl status and logs

🤝 36–45: Networking, Storage, and Services

  1. Configure NFS and Samba shares
  2. Set up Apache or NGINX web servers
  3. Manage FTP/SFTP services
  4. Configure Postfix/Dovecot for mail services
  5. Implement local DNS caching or full DNS servers
  6. Mount and troubleshoot iSCSI and Fibre Channel storage
  7. Configure and secure SSH tunnels
  8. Set up network bonding and bridging
  9. Monitor ports and services with netstat, ss, or nmap
  10. Set up local and remote backups using rsync, tar, or Bacula

⚙️ 46–50: Automation & Virtualization

  1. Write shell scripts for task automation
  2. Use Ansible for configuration management and provisioning
  3. Configure and manage KVM/QEMU virtual machines
  4. Deploy containers using Podman or Docker (on RHEL systems)
  5. Participate in system upgrades, patching cycles, and audits

🧩 BONUS: Tools Commonly Used

  • yum, dnf, rpm – package management
  • systemctl, journalctl – service and log management
  • tcpdump, wireshark – network analysis
  • top, htop, iotop, nmon – performance monitoring
  • Ansible, Kickstart, Satellite – provisioning & automation

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