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# Linux cu Command [ Linux Command Manual](#) The Linux `cu` command is used to connect to another system host. The `cu` (call up) command can connect to another host and work with an interface similar to a dial-up terminal. It can also perform simple file transfer operations. ### Syntax cu [/] **Parameter Description**: * -a or -p or --port Use the specified communication port for connection. * -c or --phone Dial the specified phone number. * -d Enter debug mode. * -e or --parity=even Use even parity check. * -E or --escape Set the escape character. * -h or --halfduple Use half-duplex mode. * -I or --config Specify the configuration file to use. * -l or --line Specify a peripheral device as the connection device. * -n or --prompt Wait for user input of the phone number when dialing. * -o or --parity=odd Use odd parity check. * -s or --speed or --baud or - Set the connection speed, measured in baud. * -t or --maper Replace CR characters with LF+CR characters. * -v or --version Display version information. * -x or --debug Use debug mode. * -z or --system Connect to the specified system host. * --help Online help. * --nostop Disable Xon/Xoff software flow control. * --parity=none Do not use parity check. ### Example Connect to a remote host # cu -c 0102377765 [ Linux Command Manual](#)