--- breadcrumbs: - - /chromium-os/developer-library/guides - ChromiumOS > Guides page_name: target-serial-access title: Target serial access --- [TOC] It is useful to be able to get a terminal on your target device. This page lists some options for this. Instructions assume Ubuntu Lucid and a 115200 serial link. Also you should be using a serial null modem cable. ## USB Serial Dongle This is a common way of getting a serial port on a computer. See [TRENDnet USB to Serial converter](https://www.google.com/url?q=http%3A%2F%2Ftrendnet.com%2Fproducts%2Fproddetail.asp%3Fprod%3D150_TU-S9%26cat%3D49&sa=D&sntz=1&usg=AFrqEzej3O8N15gqmTe0cLvyXkQt6wK5uQ) for example. ## ser2net This is a convenient tool which allows you to 'telnet' into your board over a serial link. These instructions assume you are using a single USB serial dongle (/dev/ttyUSB0) but you can also use a real serial port (/dev/ttyS0) if you like. If you have an FTDI serial device providing serial access then it will use /dev/ttyACM0. ```none sudo apt-get install ser2net ``` Edit /etc/ser2net.conf and add this line: ```none 4000:telnet:600:/dev/ttyUSB0:115200 8DATABITS NONE 1STOPBIT banner ``` Then restart so that ser2net sees your changes: ```none sudo /etc/init.d/ser2net restart ``` You can now connect to the board with: ```none telnet localhost 4000 ``` To disconnect, press Ctrl-\\ then Ctrl-D. ## screen Screen is a useful tool for maintaining connections which you can switch between easily. It is often used to run a long-running job such that you can logout, then later login, reconnect and check progress. You can also use screen to get a serial link: ```none screen -t 'ttyUSB0 115200 8n1' /dev/ttyUSB0 115200,-ixoff,-ixon ``` Reset the machine and U-Boot should start printing to your terminal. For help, use Ctrl-A Ctrl-?. To disconnect, press Ctrl-A Ctrl-D and to quit the session Ctrl-A Ctrl-\\ ## minicom Minicom is a terminal program, intended for use with a modem, that works well as an intermediary to any remote system connect through a serial port. One big advantage of minicom is that it allows one to easily capture text into a file. ### Minicom Installation To install minicom, execute the following ```none   sudo apt-get install minicom ``` ### Minicom Configuration ```none   sudo minicom -s ``` The configuration is done through a simple menu system. Use the options below for a basic working configuration. ```none   Select 'Serial Port Setup' using the arrow keys; press   Select 'A': enter the name of your serial port.  (ex: /dev/ttyUSB0)   Select 'E': select 'E' (115200), then 'Q' (8N1)   Set 'Hardware Flow Control' to 'No.   Set 'Software Flow Control' to 'No'.   Press ; this brings you back to the main menu (titled '[configuration]')   Select 'Save setup as dfl'; press .   Select 'Exit from Minicom'; press . ``` ### Execution Minicom needs access to the configured serial port. This means you either need to change the permissions on that port to allow your normal user to access the port in read/write mode, or run using 'sudo'. ```none sudo minicom ``` #### Minicom commands All commands are prefixed with <Ctrl-A>, which will be abbreviated C-a. ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none ``` ```none
Key Result
C-a Z Opens interactive menu
C-a C Clear Screen
C-a LPrompt for capture log file name.
C-a L(after opening log file) Pause or close log file
C-a Q Quit (w/o modem reset)
C-a X Quit immediately
C-a EToggle echo of locally typed characters
C-a W Toggle Line Wrap
C-a T Select terminal settings
``` ## ssh Once you have network access, and assuming you are using a test build, you can use ssh to connect to your target. ```none ssh chronos@192.168.2.3 (password test0000) ```