User Guide

The best place to use the operating system is the web demo. When running the web demo, the “recipes” dropdown allows entering some fun commands in the terminal and executing them. It can be re-run using the buttons on the UI or by refreshing the page if you get into trouble.

Using the shell

Otium’s shell is a subset of the Tcl programming language.

All commands can be printed out by entering help and command names can be searched through using help <name>, ex help fs/ to get help on all filesystem related commands.

run can be used to run built in C++-compiled programs

For example

run echo hello world echos hello world.

shutdown shuts the operating system down (if using the web demo).

dofile can be used to execute Tcl programs created using the editor or filesystem commands.

For example,

fs/write hello.tcl “puts “hello world""

dofile hello.tcl

Will print hello world.

Using graphical applications

Graphical applications can be quit with Alt-Q. Multiple graphical applications can be navigated between using Alt-<number>.

Using the editor

There is a built in graphical editor which supports a very small subset of Vim/emacs keybindings.

Use Alt-X to enter commands.

The command mode (which can be triggered with M-x or the key ; when in vim mode) evaluates Tcl strings. The built in commands are:

w for write q for quit togglemode to toggle vim mode on and off