mlmmjadmin-3.0 and later releases require Python 3.5+, only listed distribution releases are qualified to upgrade:
If you're running an old Linux/BSD release which doesn't have Python 3.5+, please stay with mlmmjadmin-2.1, it's the last release supports Python 2. if you need to upgrade to mlmmjadmin-2.1, please follow this upgrade tutorial instead: Upgrade mlmmjadmin to v2.1.
wgetcommand, extract download package and run a script to upgrade it. Note: We use version
3.1.2for example here,
cd /root/ wget https://github.com/iredmail/mlmmjadmin/archive/3.1.2.tar.gz tar zxf 3.1.2.tar.gz cd mlmmjadmin-3.1.2/tools/ bash upgrade_mlmmjadmin.sh