netwatch — Network Bandwidth & Connection Monitor

A terminal dashboard for watching live network throughput and active connections, written as a single-file Python 3 script using curses.

Features

• Live per-interface download/upload rates with rolling sparkline graphs
• Scrollable table of active TCP/UDP connections (IPv4 + IPv6), showing PID, process name, protocol, local/remote address, and connection state
• Sort the connection table by PID, process, protocol, address, or state, ascending or descending
• Live substring filter across process name, PID, addresses, and state
• Adjustable refresh interval and pause/resume
• Falls back to per-process queries (your own processes only) when not running as root, instead of failing outright

Requirements

• Python 3.8+
• psutil (pip install psutil)

Usage

chmod +x netwatch.py
./netwatch.py

Run with sudo to see connections belonging to all users' processes; without it, only your own processes are visible.

Key bindings

Key	Action
↑/k, ↓/j	Move selection in the connection table
PgUp / PgDn	Jump 10 rows
s	Cycle sort column
S	Reverse sort direction
/	Filter connections (Enter to apply, Esc to clear)
p	Pause / resume live updates
+ / -	Increase / decrease refresh rate
q	Quit