A serial terminal is software that allows communication with devices through a serial port, often used for debugging embedded systems and interacting with hardware like microcontrollers. It essentially acts as a bridge, displaying data sent to and received from the connected device and enabling users to send commands or data to the device.
These utilities provide a text-based way to communicate with equipment through serial ports, USB-to-serial adapters, modems, and console cables. They are commonly used by developers, system administrators, electronics hobbyists, and embedded Linux users who need direct access to routers, switches, microcontrollers, single-board computers, industrial controllers, test instruments, or headless systems.
Their main job is to open a serial device, apply connection settings such as baud rate, data bits, parity, stop bits, and flow control, then pass keystrokes and output between the local terminal and the remote device. This makes it possible to configure hardware, watch boot messages, debug firmware, recover systems, issue AT commands, test links, and interact with serial consoles when networking is unavailable.
Some favour a full-screen, menu-driven experience with configuration profiles, dialing support, scripting, logging, file capture, and transfer features. Others deliberately stay tiny and simple, offering quick command-line invocation, minimal dependencies, and behaviour suited to troubleshooting or embedded development. Modern examples often add conveniences such as automatic device selection, reconnection, timestamped logs, colourised output, and cleaner handling of USB adapters.
Together, they cover the spectrum from classic modem-style communication suites to lightweight serial console tools for fast, reliable command-line access across Unix-like and cross-platform environments alike.
To highlight the quality of software available, we have compiled a list of 7 useful terminal-based serial communication tools for Linux.
Our findings are presented in the ratings chart below in the classic LinuxLinks style. Only free and open source software is eligible for inclusion.
Let’s explore the 7 tools. Click the links in the table below to learn all about each program.
| Terminal-Based Serial Terminals | |
|---|---|
| tio | Straightforward TTY I/O with profiles and clean command syntax |
| minicom | Menu-driven comms tool with dialing, scripting, and capture |
| ComChan | Fast Rust monitor with plotting, logging, and TUI workflow |
| picocom | Minimal modem tester for low-overhead device console access |
| Commy | Small cross-platform utility for UART, TTY, and COM devices |
| ssterm | Python-based console app with easy setup and output formatting |
| opencu | Portable cu-style console for quick Linux device connections |
 Explore our carefully curated directory of recommended free and open source software, covering every major software category.The directory forms part of our extensive collection of articles for Linux enthusiasts. It includes hundreds of detailed reviews, together with free and open source alternatives to proprietary software from companies such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. LinuxLinks also covers interesting projects worth exploring, Linux-compatible hardware, free programming books and tutorials, and much more. Know a useful free and open source Linux application that we haven’t covered? Tell us about it using our submission form. |
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