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All Linux lovers, and supporters of open source code and free software, in the Kanto area (or anywhere else) are invited to attend the next Tokyo Linux Users Group meeting. Membership is open to anyone. There are currently no membership dues or entrance fees.

TLUG meetings are traditionally small and unstructured (VERY CASUAL). Most of the benefit of the meeting comes from chatting with other Linux users and having informal discussions.

As a general rule, the Technical Meetings are held on the 2nd Saturday of odd-numbered months and the Nomikai Meetings are usually held on the 2nd Friday of even-numbered months. There are, of course, exceptions to this rule, so it is best to keep an eye on the mailing list, or check back here for date/venue changes as the date approaches.

Technical Meeting


June 11, 2016 (Saturday)




IIJ (Internet Initiative Japan)
Iidabashi Grand Bloom
2-10-2 Fujimi
Chiyoda-ku, Tokyo 102-0071


  • Wait at the reception in the office entrance lobby in the 2F
  • We will all go together to the room at 13:30
  • If you arrive after that phone Edward to be let in Ph. 090 3689 0292


Visualising Trees and Graphs using TCL/TK and GraphViz (by Benjamin Kowarsch)

This is a rather more practical presentation of tree and graph visualisation in two parts:

(1) Rendering syntax diagrams using TCL/TK

In this part Benjamin will show how he generates and renders nice looking syntax diagrams (aka railroad diagrams) with an open source TCL/TK script and how you can modify the script for your own needs.

(2) Generating syntax trees and rendering them with GraphViz

In this part Benjamin will give a basic overview of the DOT graph language used by the open source renderer GraphViz, then he will show how he builds syntax trees from source code to generate DOT output using his own compiler (written in C) and then render the output with GraphViz.

Attendees are invited to pre-install TCL/TK and GraphViz on their computers for some practical experimentation after the presentation.

Fire Eye Services and Technology and the role of a Linux Admin (by Erin Hughes )

A brief overview of Fire Eye(*) services and technology and how Linux administration skills are the key to success in securing non-Linux (e.g. Windows) environment.



After the presentations we will go for drinks somewhere around Iidabashi Station.

Other items on the agenda
  1. Introduction of new members
  2. News about Linux/Open Source, general announcements, Q&A
  3. Auction (bring any gear that would would like to donate to TLUG)

Contact Info

For directions or information before the meeting, call:

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