I run Mattermost on Ubuntu 16.04.2 LTS
I wanted to upgrade from 3.4.0 to 3.6.2
I backup up my config.json… in fact I copied the full “old” mattermost folder.
I downloaded and extracted the file to /opt/mattermost/
Then copied my config.json file
I started it, and everything was there : the teams, the channels, the users… ALL except my files.
I’m referring to all the PDFs and other documents that were posted on Mattermost.
Then I noticed I didn’t copy the data file located in /opt/mattermost/bin/data
So I copied it… rebooted… but still it doesn’t work.