OVERDRIVE // CLI

Linux Kernel, Network & System Performance Optimizer

OVERDRIVE is an open-source Linux kernel, network, and system performance optimization CLI tool. It provides real-time hardware telemetry, an interactive terminal dashboard, and remote server tuning over encrypted SSH.

OVERDRIVE tunes kernel networking parameters, TCP window buffers, multi-core CPU queue balancing, memory governance, storage I/O, DNS resolution, and SSH latency with automated pre-flight safety backups.

• Technical Function: Master orchestrator that executes all 10 optimization tiers sequentially in automated, conflict-free dependency order.
• Problem Solved: Manually configuring dozens of kernel sysctl directives, systemd services, ulimits, and firewall tables is error-prone. God Mode runs a single pass with automated pre-flight safety backups, applying a complete production baseline in under 15 seconds.

• Technical Function: Auto-probes the running Linux kernel for BBRv3, BBR2, or BBR congestion control, paired with CAKE or FQ queue disciplines, and expands dynamic TCP socket memory buffers up to 64MB (rmem_max / wmem_max).
• Problem Solved: Legacy loss-based congestion algorithms (Cubic, Reno) misinterpret shallow packet loss as network congestion, prematurely cutting throughput by 50%. BBR models real-time bandwidth and bottleneck round-trip time, unlocking full bandwidth utilization across high-latency international transit.

• Technical Function: Clamps the TCP Maximum Segment Size (TCPMSS) to 1360 bytes using persistent Netfilter (iptables -t mangle) rules managed by an auto-reloading systemd unit.
• Problem Solved: Mobile carriers (4G/5G/LTE), cellular tunneling (GTP-U), and VPN overlays (WireGuard, VLESS, VMess) add packet encapsulation overhead. Standard 1500-byte MTU packets exceed path MTU limits and get dropped by carrier firewalls without ICMP responses ("Path MTU Black Hole"). Clamping to 1360 prevents packet fragmentation worldwide.

• Technical Function: Calculates CPU affinity bitmasks across all available CPU cores and binds them to network interface receive and transmit queues (/sys/class/net/*/queues/rx-*/rps_cpus).
• Problem Solved: Default Linux network drivers process all inbound packets on CPU0, causing a single core to peg at 100% under high traffic while remaining cores sit idle. RPS/XPS spreads SoftIRQ interrupts evenly across all vCPUs.

• Technical Function: Provisions an NVMe/SSD swapfile (tuned with vm.swappiness=10), enforces Go runtime memory governance (GOMEMLIMIT=90%), accelerates garbage collection memory reclaiming (madvdontneed), and raises system-wide file descriptor limits to 1,048,576.
• Problem Solved: Protects critical services from kernel OOM-killer termination during memory spikes and prevents high-concurrency proxies from throwing "Too many open files" socket errors.

• Technical Function: Sets block device readahead to 1024 KB via persistent udev rules and tunes kernel dirty page memory writeback ratios (vm.dirty_background_ratio=5, vm.dirty_ratio=10).
• Problem Solved: Prevents system-wide I/O micro-stutters and blocking disk write stalls during heavy logging or database transactions by flushing dirty pages smoothly in the background.

• Technical Function: Configures Anycast resolvers (Cloudflare 1.1.1.1, Google 8.8.8.8) with options single-request-reopen and parallel resolution in /etc/resolv.conf.
• Problem Solved: Resolves DNS lookup latency when establishing outbound connections and prevents dual-stack IPv4/IPv6 socket lookup collisions.

• Technical Function: Disables reverse DNS resolution (UseDNS no), strips GSSAPI authentication delays, enforces keepalive pings (ClientAliveInterval 30), and verifies syntax (sshd -t) before reloading sshd.
• Problem Solved: Eliminates the 3-5 second login delay when connecting over SSH and prevents idle terminal sessions from dropping.

• Technical Function: Updates repository mirrors, installs core diagnostic toolchains (curl, socat, jq, iperf3, mtr, haveged), syncs server timezones with GeoIP datacenter location, and opens QUIC / HTTP/3 UDP ports (443/udp).
• Problem Solved: The haveged daemon provides hardware entropy to prevent cryptographic TLS handshake delays, while timezone synchronization ensures log timestamps align accurately.

• Technical Function: Injects kernel boot parameters (transparent_hugepage=madvise, elevator=none) into /etc/default/grub and updates the bootloader.
• Problem Solved: Reduces memory allocation latency and allows virtual machines to utilize host hypervisor I/O schedulers directly without guest scheduling overhead.

• Technical Function: Injects low-latency TCP socket parameters (TCP_NODELAY, SO_KEEPALIVE, TCP_FASTOPEN), cached DNS rules, and global SNIs into 3x-ui (/etc/x-ui/x-ui.db) and xray-core.
• Problem Solved: Eliminates connection establishment latency via 0-RTT FastOpen and prevents proxy socket timeouts on long-lived connections.

• Technical Function: Runs genuine hardware stress tests: CPU SHA-256 hash throughput (Ops/sec), RAM memory copy bandwidth (GB/s), direct sync disk write I/O (MB/s), and real-time CDN edge download throughput (Mbps).
• Problem Solved: Provides authentic, non-simulated performance metrics to benchmark server capabilities before and after tuning.

• Technical Function: Measures real-time ICMP round-trip latency, jitter, and packet loss across 6 true unicast looking-glass gateways (Frankfurt, London, New York, San Jose, Singapore, Tokyo).
• Problem Solved: Verifies international routing quality and identifies routing anomalies across global backbone paths.

• Technical Function: Non-destructive, read-only audit matrix verifying kernel congestion control, QDiscs, buffers, Netfilter tables, RPS masks, memory limits, DNS, and SSH configuration.

• Technical Function: Restores /etc/sysctl.d/, /etc/ssh/, Netfilter tables, and proxy databases from pre-flight backups, with an explicit safety confirmation modal (REVERT / Y).

curl -sSL https://raw.githubusercontent.com/nullbytee1/overdrive-cli/main/run.sh | bash

git clone https://github.com/nullbytee1/overdrive-cli.git
cd overdrive-cli

# Install dependencies
pip install -r requirements.txt

# Launch OVERDRIVE
python overdrive.py

run.bat

OVERDRIVE includes a complete unit and integration test suite:

python -m unittest discover -s tests -p "test_*.py" -v

Ran 36 tests in 0.838s
OK

• Automated Pre-Flight Backups: Archives /etc/sysctl.d/, /etc/ssh/sshd_config, /etc/hosts, /etc/default/grub, and databases prior to any modification.
• Strict Idempotency: Running modules multiple times or running "God Mode" on a pre-configured server will never create duplicate rules or corrupt settings.
• Zero-Flicker Live UI: Built using Rich's Live terminal rendering for smooth, flicker-free telemetry and navigation.

Created by nullbyte.

Distributed under the MIT License. Free for personal and commercial use.