I am running Ubuntu for the first time by booting from a USB drive. Now I have plugged in a USB-to-serial converter which has been recognized and automatically added as /dev/ttyUSB0.

How do I access /dev/ttyUSB0?


Use one of screen's lesser known features:

screen /dev/ttyUSB0
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    if you need to specify the baud rate, add it after the serial device. eg, for 57600 baud: screen /dev/ttyUSB0 57600 – Jeremy Kerr Mar 13 '12 at 12:45
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    Note that if you want to detach from the terminal and CTRL-D isn't cutting it, use CTRL-A then k to kill screen. I had to use this with the TTY at ~/Library/Containers/com.docker.docker/Data/com.docker.driver.amd64-linux/tty provided by Docker for Mac. CTRL-A then d will work too, but will leave your screen session running, which may or may not be what you want. – Vanessa Phipps Nov 17 '16 at 17:14
busybox microcom -t 5000 /dev/ttyUSB0

Source: http://forum.xda-developers.com/showthread.php?t=1471241


You can use putty. Its an ssh/serial/telnet client for Windows and Linux. You can download it from http://linux.softpedia.com/get/System/Networking/PuTTY-347.shtml


you can use ckermit also. It should be in the repository. After installing it create a file in your home directory called .mykermrc then add the 5 following lines:

set line /dev/ttyUSB0   
set flow-control none  
set carrier-watch off  
set speed 115200  

parameters can be adjusted as necessary.
save the file.
to start it

sudo kermit 

You could use tio - a simple tty terminal I/O application:

tio /dev/ttyUSB0

See http://tio.github.io


I was using puTTY to connect to the serial ports. But don't forget to add your user to dialout: sudo adduser <username> dialout then reboot the system. After that, you can use puTTY for serial connections such as /dev/ttyUSB0.

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    it is actually enough to simply log out and back in again. – Azsgy Jul 24 '15 at 19:04

Needed Mint 17.1 to talk to my Arduino, after a little chasing around, the best way I found was to either:

sudo gedit /etc/group

goto line...


add your "username"


save file

or use

Administration - Users & Groups - Manage Groups

goto line "dialout" check properties to ensure that "username " is ticked if not "username" must be added.

This worked for me and by the look of lots of posts others have had the same problem. Hope this helps guys.

  • 13
    -1 for sudo gedit /etc/group. Don't. Just don't. Learn how to add a user to a group using usermod or adduser for example. And your post is more of a comment rather than an answer to the question, because you don't actually show how to connect. – gertvdijk Dec 24 '14 at 14:36

You can use picocom, it is a minimal dumb-terminal emulation program. Basic usage is something like this (change 11520 to the desired baud rate):

$ picocom -b 115200 /dev/ttyUSB0

You have all the options you may want from a dumb-terminal program, like stop bits, parity, local echo, carriage return / line feed / backspace / delete / tab translation, X/Y/Z-modem and ASCII transfer integration, etc.

See man picocom and picocom --help for further information.


Using Lucid and a Dynamode USB to RS232 cable:

Plugged it in
ran kermit
set line /dev/ttyUSB0    <<-- mind the capitals/lowecase
set speed 9600

and successfully connected to an RS232 port on an OpenVMS server.

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