Ubuntu Server Setup Guid

sudo apt-get install mc

sudo apt-get install ssh

/etc/ssh/sshd_config:

PermitRootLogin no
AuthorizedKeysFile	%h/.ssh/authorized_keys

sudo service ssh restart

On client's side:

ssh-keygen -t dsa
(empty answer for every question)

ssh-copy-id "client_user_name@server_ip_address"  
ssh "client_user_name@server_ip_address"  

Back on server:
/etc/ssh/sshd_config:

PasswordAuthentication no

sudo service ssh restart  

Download installer from https://bitnami.com/stack/redmine/installer#linux

Use /opt/redmine as a default directory.

How to change port from default 80 to e.g. 8080:

/opt/redmine/apache2/conf/httpd.conf:

Listen 8080
ServerName localhost:8080

/opt/redmine/apache2/conf/bitnami

NameVirtualHost *:8080
<VirtualHost _default_:8080>

How to autostart:

sudo cp opt/redmine/ctlscript.sh /etc/init.d/bitnami-redmine

/etc/init.d/bitnami-redmine:

### BEGIN INIT INFO
# Provides:          scriptname
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start daemon at boot time
# Description:       Enable service provided by daemon.
### END INIT INFO

sudo update-rc.d -f bitnami-redmine defaults
sudo update-rc.d -f bitnami-redmine enable

To remove autostart:

sudo update-rc.d -f bitnami-drupal remove

Prepare (do it once):

sudo apt-get install make
sudo apt-get install ruby-dev
sudo apt-get install ruby1.9.1-dev
sudo apt-get install zlib1g-dev
sudo apt-get install libmysqlclient-dev
sudo apt-get install imagemagick
sudo apt-get install libmagickwand-dev

sudo gem install json -v '1.8.2'
sudo gem install nokogiri -v '1.6.6.2'
sudo gem install mysql2 -v '0.3.14'
sudo gem install rmagick -v '2.13.4'

Copy plugin to /opt/redmine/apps/redmine/htdocs/plugins:

cd /opt/redmine
./use_redmine
cd apps/redmine/htdocs
bundle install --without development test postgresql sqlite
or
  bundle install --without development test postgresql sqlite --no-deployment
  bundle install --without development test postgresql sqlite --deployment  
ruby bin/rake redmine:plugins RAILS_ENV=production
exit
./ctlscript.sh restart