Ubuntu Linux Development System

These instructions will detail configuring a desktop / laptop workstation in the same manner as the support and development teams at Gateworks. The command examples used within the Gateworks wiki were written and tested using this or a similar configuration.

1. Install Ubuntu
   1. Ubuntu Focal (20.04LTS) recommended at this time.
      • Tutorial: ​https://tutorials.ubuntu.com/tutorial/tutorial-install-ubuntu-desktop#0
      • Download: ​https://www.ubuntu.com/download/desktop
   2. Alternately live boot Ubuntu off a USB drive or CD.
      • ​https://tutorials.ubuntu.com/tutorial/try-ubuntu-before-you-install#0
      • Be sure to allow for your changes to be persistent when using live boot.
        • ​https://wiki.ubuntu.com/LiveUsbPendrivePersistent

After installing Ubuntu, procedures are complete run "apt-get update" command.

The following are the package and configuration changes we make at Gateworks for a Linux Development System. These are tailored towards Ubuntu 16.04 x86-64 desktop.

Add Local User

Working as root can be hazardous.

• Add local user called 'username'

  sudo adduser username 
  

  • "username" being the user added
  • follow/complete prompts
• Add user 'username' to sudo group group

  sudo usermod -aG sudo username 
  

  • This command will grant your new user sudo privileges
  • -aG add to group

OpenSSH server (allow remote ssh)

• Install

  sudo apt-get install openssh-server 
  

  • default configuration should provide operable connections
• Edit /etc/ssh/sshd_config and set PermitRootLogin yes
• Start service (or reboot)

  /etc/init.d/ssh start 
  

TFTP Server

Very popular TFTP server (recommended)

Install the software on a Linux Desktop machine:

sudo apt-get install tftpd-hpa

Modify the config file for the TFTP server software (/etc/default/tftpd-hpa) and set the directory to anything where you would like to host the files (example /var/www/html/tftpboot)

TFTP_USERNAME="tftp"
TFTP_DIRECTORY="/tftpboot"
TFTP_ADDRESS=":69"
TFTP_OPTIONS="--secure"

Be sure the tftpboot directory has modified permissions and ownership:

sudo mkdir /tftpboot
sudo chmod -R 777 /tftpboot
sudo chown -R nobody /tftpboot

To re-start after re-configure:

sudo service tftpd-hpa restart

For more information see tftpserver.

Development Tools

Install common dev toos:

sudo apt-get install build-essential git curl wget

Configure Git to use 12 character SHA. This can potentially prevent version magic errors when building out of tree modules.

git config --global core.abbrev 12

To verify, go to your kernel build directory and execute the following command.

git rev-parse --short HEAD

Screen

Screen is an excellent terminal program as well as remote shell/session manager.

sudo apt-get install screen

Additionally you may want to customize your ~/.screenrc for scrolling via mousewheel etc:

cat ~/.screenrc
defscrollback 5000

logfile /tmp/screenlog

# Escale sequence
#escape ^uu

# enable scrolling in the terminal (not necessarily in the screen session)
# if scrollback is scrolling through command history then you need to
# enter scrollback 'copy mode' via Crtl+a Esc
termcapinfo xterm* ti@:te@

# status
hardstatus alwayslastline "%{= kw}%{g}[%=%{ =kw}%{w}%-w%{Y}[%{W}%n-%t%{Y}]%{w}%+w%=%{g}]"

If you encounter terminal type issues you can usually fix these by resizing your terminal to 80x24 and setting term type via:

export TERM=screen

Logging:

• the above .screenrc sets 'logfile' to /tmp/screenlog. Otherwise it defaults to 'screenlog.0' in your current directory
• start screen with -L to enable logging (to logfile, which is defaulted to /tmp/screenlog if you use the .screenrc above). This will only log the first window
• to change the logfile name use cntl-A + : + logfile <name>
• to toggle logging use cntl-A H
• to dump the current scrollback buffer to a log use cntl-A h which will dump to 'hardcopy.<n>'

Conclusion

See our index to locate instructions for installing Jtag_usbv4 and BDK's.