[[PageOutline]]
= 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 Xenial (16.04LTS) recommended at this time (* Ubuntu Bionic (18.04LTS) is still being validated by Gateworks engineers ) 
  * Tutorial: https://tutorials.ubuntu.com/tutorial/tutorial-install-ubuntu-desktop#0
  * Download: https://www.ubuntu.com/download/desktop
 1. 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
 1. A VM can be used, this method is least preferable.
   * https://askubuntu.com/questions/142549/how-to-install-ubuntu-on-virtualbox

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'
{{{#!bash 
sudo adduser username 
}}} 
  - "username" being the user added
  - follow/complete prompts
 * Add user 'username' to sudo group group
{{{#!bash  
sudo usermod -aG sudo username 
}}} 
  - This command will grant your new user sudo privileges 
  - -aG add to group  


== OpenSSH server (allow remote ssh)

* Install
{{{#!bash 
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)
{{{#!bash  
/etc/init.d/ssh start 
}}} 

== TFTP Server
Very popular TFTP server (recommended)

Install the software on a Linux Desktop machine:
{{{#!bash
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)
{{{#!bash
TFTP_USERNAME="tftp"
TFTP_DIRECTORY="/tftpboot"
TFTP_ADDRESS="0.0.0.0:69"
TFTP_OPTIONS="--secure"
}}}

Be sure the tftpboot directory has modified permissions and ownership:

{{{#!bash
sudo mkdir /tftpboot
sudo chmod -R 777 /tftpboot
sudo chown -R nobody /tftpboot
}}}

To re-start after re-configure:
{{{#!bash
sudo service tftpd-hpa restart
}}}


== Development Tools
* install common dev toos:
{{{#!bash
sudo apt-get install build-essential git curl wget
}}}

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

{{{#!bash
sudo apt-get install screen
}}}

Additionally you may want to customize your ~/.screenrc for scrolling via mousewheel etc:
{{{#!bash
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:
{{{#!bash
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 [http://trac.gateworks.com/wiki/TitleIndex index] to locate instructions for installing Jtag_usbv4 and BDK's.