Redmine has to be restarted after a plugin installation.
How can I do that on linux? Does it mean to restart my web server (nginx in my case)? Or do I have to do something else?
Restart your webserver. How to do that depends on your webserver you installed Redmine in, and your Linux distribution. For Apache on Debian, I'd do a:
# /etc/init.d/apache restart
Redmine will restart at the next page request. This is often the only way if you're on an instance where you don't have permission to restart Apache (shared hosting, etc).
You just need to stop WebRick by doing a Ctrl+C, if running Mongrel you sould try
Ubuntu (10.04) installs redmine (0.9.3) with passenger. It is passenger that really does restart application using (in /usr/share/redmine):
However, there is another point there. In config/environment.rb, the setting
config.action_mailer.perform_deliveries = false
must be changed to:
config.action_mailer.perform_deliveries = true
I found it was too much hassle to setup Gmail SMTP, so I've rather setup exim4.