I pulled together the pieces to view the 74880 baud bootloader messages from the

Electronics
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I pulled together the pieces to view the 74880 baud bootloader messages from the ESP-8266 on Ubuntu. While it isn’t fully integrated into a terminal emulator, it gets the job done.
http://sensornodeinfo.rockingdlabs.com/blog/2016/01/19/baud74880/

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You can use miniterm.py which supports 74880 baud (on my laptop at least).

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@Brian_Walton Thanks! That works for me too. At least with the FTDI adapter.