Web Reference: Oct 14, 2020 · What minicom tells you with this message that it has tried to open a interface called /dev/modem. It is telling you, that it can't be opened due to insufficient permissions. Jan 16, 2026 · However, a common roadblock arises when using minicom (a terminal emulator) on the host: the error minicom: cannot open /dev/modem: No such file or directory. This blog post will demystify this error, walk you through its root causes, and provide a step-by-step guide to resolve it. Jun 4, 2024 · 本文详细讲述了在Ubuntu环境下使用minicom遇到'/dev/modem'错误的解决过程，包括临时启动、设备路径替换、配置文件编辑和软链接创建，以提高效率。
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