A summary of my technical skills in Linux and Windows environments.

Operating Systems Knowledge

• Windows OS (Windows 7, 10, 11, Server 2016). Installation, configuration and troubleshooting. User account management, Group policies, Active Directory (AD), Registry and system settings adjustments.
• macOS (Basic familiarity). General configuration, troubleshooting and system preferences. Disk management and repair (Disk Utility).
• Linux (Debian/Debian-like, Fedora, QubesOS). Very familiar with the command-line interface (CLI). File system and package management, User permissions and administration (using sudo, chmod, chown). Installing software via package managers (e.g., apt, yum).

Hardware Troubleshooting & Support

• Desktop PCs, laptops, servers, and peripherals (keyboards, mice, monitors, printers).
• Assembling and upgrading hardware components (CPU, RAM, HDD/SSD, GPU, etc).
• BIOS/UEFI Configuration, boot order management, etc.
• Firmware and hardware installation, diagnostics, troubleshooting.
• Troubleshooting printer, scanner, and peripheral management and connectivity issues.

Networking Knowledge

• TCP/IP Networking, IP addressing, subnetting, and DNS configuration. Understanding of DHCP, HTTP, HTTPS, FTP, SMTP, POP3, etc. Wired network installations.
• Wi-Fi Networks setting up, securing, and troubleshooting. Router configuration and troubleshooting and specially with OpenWRT devices.
• VPNs and Remote Access: VPN configuration (Wireguard, OpenVPN, sshuttle).
• Remote desktop support (RDP, VNC, Remmina).

Troubleshooting & Diagnostics

• System Boot Issues.
• BIOS troubleshooting, bootloader issues.
• Safe mode, recovery environments (Linux, Windows).
• Software Conflicts & Blue Screen of Death (BSOD).
• Using event logs and error messages for diagnosis.
• Performance Troubleshooting.
• Disk cleanup, defragmentation, and system optimizations.
• Process and resource management using htop, glances and Task Manager (Windows).

Backup & Recovery

• Making system Backups and recoveries.
• Using built-in tools (Windows Backup and restore).
• Third-party backup software.
• Data Recovery.
• Recovering files from damaged or corrupted drives.
• Skilled in manual data recovery.

Security

• Good knowledge of cybersecurity principles (antivirus, encryption, firewalls) environments to protect systems from malware, malicious software and cyber attacks.
• Performing system security patches and software updates.
• Network monitoring.