cu
TLDR
Open a serial port
$ sudo cu -l [/dev/ttyXYZ]
Open serial port with specific baud rate$ sudo cu -l [/dev/ttyXYZ] -s [115200]
Open with half-duplex mode (local echo)$ sudo cu -l [/dev/ttyXYZ] -s [115200] -h
Open with parity and no flow control$ sudo cu -l [/dev/ttyXYZ] -s [115200] --parity=[even] -f --nostop
Exit the cu session$ <Enter><~><.>
SYNOPSIS
cu [options] [system|phone|host]
DESCRIPTION
cu (Call Up) connects to another system acting as a dial-in terminal. It's commonly used for serial console access to embedded devices, routers, switches, and other hardware.
The escape sequence to disconnect is: press Enter, then ~ (tilde), then . (period).
PARAMETERS
-l, --line device
Serial device to use-s, --speed baud
Baud rate (e.g., 9600, 115200)-h, --halfduplex
Echo characters locally--parity type
Parity: even, odd, or none-f, --nortscts
Disable hardware flow control--nostop
Disable software flow control
CAVEATS
Usually requires root or membership in dialout/uucp groups. The escape character (~) must be at the start of a line. Part of the UUCP package or GNU coreutils.
