Fix minicom: cannot open /dev/ttyUSB0: Permission denied on Ubuntu 16.04.3

This post presents a solution to minicom: cannot open /dev/ttyUSB0: Permission denied that was verified on Ubuntu 16.04.3.

Symptom

When you type: minicom you see minicom: cannot open /dev/ttyUSB0: Permission denied

A Solution on Ubuntu 16.04.3

1. Type sudo adduser $USER dialout

2. Log out

3. Log in

References

• Ubuntu logo from [link]

• Serial port terminal > Cannot open /dev/ttyS0: Permission denied at [link]