https://github.com/themondays/Dwarf

Installation
Copy production/dwarf directory to the Redmine's /public/themes directory on your Redmine instance. Basically you should have something like that /public/themes/dwarf
Restart Redmine instance.
Activate theme inside settings.
If after Redmine instance restart theme didn't appear in your list, please ensure that theme stylesheet available at the following location /public/themes/dwarf/stylesheets/application.css

インストール

$ cd [Redmineインストールディレクトリ]/public/themes/
$ git clone https://github.com/themondays/Dwarf.git dwarf

https://www.redmine.org/projects/redmine/wiki/Plugins?utm_source=newsletter&utm_medium=email&utm_campaign=TRG_1801-gantt-01-installation-package-eng

#{RAILS_ROOT}/plugins.

https://github.com/redmica/redmica_ui_extension

プラグイン　redmine_issues_tree

https://github.com/Loriowar/redmine_issues_tree

https://1kara-hajimeru.com/2020/09/1188/

Redmine5.xにインストール

$ cd ${RAILS_ROOT}/plugins
$ git clone -b 5.0.x https://github.com/Loriowar/redmine_issues_tree.git

$ cd ../
$ bundle install --without development test --no-deployment
$ bundle exec rake redmine:plugins NAME=redmine_issues_tree RAILS_ENV=production

Tags plugin

https://www.redmineup.com/pages/help/tags/tags-installation-linux

checklists

https://www.redmineup.com/pages/help/checklists

bundle install --without development test について

プラグインインストールの際には下記を実行するように指示されるが……

$ bundle install --without development test --no-deployment

下記のエラーが出るので

[DEPRECATED] The --without flag is deprecated because it relies on being remembered across bundler invocations, which bundler will no longer do in future versions. Instead please use bundle config set --local without 'development test', and stop using this flag
[DEPRECATED] The --no-deployment flag is deprecated because it relies on being remembered across bundler invocations, which bundler will no longer do in future versions. Instead please use bundle config set --local deployment 'false', and stop using this flag

今後はこうするのが良いのかな……？

$ bundle config set --local without 'development test'
$ bundle config set --local deployment 'false'
$ bundle install