Debian places redmine files in non-standard locations to make it easier to build a redmine server that can handle multiple instances. However, this makes it hard to find things. Following are some locations we may need to find.

/usr/share/redmine/lib/plugins

/var/lib/redmine/default/files

I find this a pain for backups. I tend to back up directory trees, so you could back up /var/lib/redmine/*, but instead, I simply make that directory a symlink to someplace I already back up, like /home.

mkdir /home/redmine_data
mv /var/lib/redmine/default/files /home/redmine_data
ln -s /home/redmine_data/files /var/lib/redmine/default/files

https://www.redmine.org/projects/redmine/wiki/RedmineReceivingEmails

I moved from OpenProject to Redmine. OpenProject spends more time on GUI than I wanted, and since it was based on Redmine, I just decided to install that. However, OpenProject says it exports, but never got that working. Redmine imports tasks only, but not projects, users, etc… (there is a plugin that may do it, but I did not try).

Brief instructions on importing issues from a CSV. I did not try this.

https://redmine.org/projects/redmine/wiki/HowTo_import_issues

Project - must exist Parent Issue - A number, IN THE SPREADSHEET (row - 1), or a pound sign followed by a number, which is existing issue # something

 So, if it has a 5, it will be the fifth issue in the import spreadsheet (row 6, since the header is on row 1)
 If it has a #5, look for the existing issue in Redmine with that issue number
 

Assignee - the login name or the first/last name of who the issue is assigned to

Category - A category for it. May be in the list of existing categories, or my create a new one.

Start Date = date, in YYYY-MM-DD format the issue was created End Date = date, in YYYY-MM-DD format the issue was closed Author - the login name of the person creating the project (defaults to user doing the import, probably)

Subject - the subject line of the issue