Changes

OLDVERSION=$(/home/chat/mattermost/bin/platform version 2>&1 | head -n 1 | awk '{print $2}')

wget https://releases.mattermost.com/$VERSION/mattermost-team-$VERSION-linux-amd64.tar.gz

mv mattermost mattermost-$OLDVERSION

tar xvf mattermost-team-$VERSION-linux-amd64.tar.gz