How do I start a ruby/gem program?

Question

I have installed taskjuggler (gem install taskjuggler), but now I have no idea how to start it...

$ taskjuggler
taskjuggler: command not found

$ gem taskjuggler
ERROR:  While executing gem ... (RuntimeError)
    Unknown command taskjuggler

this one was on the taskjuggler page, with no explanation:

$ gem "taskjuggler", "~> 3.2.0"
ERROR:  While executing gem ... (RuntimeError)
Unknown command taskjuggler,

Also, the installation page tells nothing about how to run it.

How do I run this program?

--update:

$PATH 
bash: /usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games: No such file or directory

Not.. the behavior is the same. By the way, which of the 3 commands I'm trying is the correct one to run the app? — The Student, Jun 6, 2012 at 21:45
Is this gem meant to be a binary executable or is it meant to be used as require gemname in other ruby scripts? — nikhil, Jun 7, 2012 at 10:44

nikhil · Accepted Answer · 2012-06-07 10:48:20Z

3

It might sound rude but try reading the manual for that gem first. The usage for the gem is

tj3 --version

answered Jun 7, 2012 at 10:48

nikhil

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This command line shows the version, ok, but how do I start it? I see no explicit topic in the manual about starting, the topic "your first project" make it looks like you have to program a software to create a project, but on the screenshot I saw a graphical application, how do I start that graphical application?
– The Student
Jun 11, 2012 at 12:49
The command line tj3 alone gives me Error: You must provide at least one .tjp file, and an empty .tjp file shows Error: Unexpected token '<END>' found. Expecting one of 'include', 'macro', 'project'. Can't I start a new empty project?
– The Student
Jun 11, 2012 at 12:51
can you tell me where you saw your screenshot?
– nikhil
Jun 11, 2012 at 13:23
Try following chap 4 in the manual. It tells you how to create your first project.
– nikhil
Jun 11, 2012 at 13:25

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