Which software to use?

Of course you can use every other software to create torrent files but I would recommend mktorrent.

Creating the torrent file
mktorrent -a udp://tracker.openbittorrent.com:80/announce $Installer
Redundancy

If one tracker is not functioning it's always good to have a backup. This project (https://github.com/ngosang/trackerslist) helped to pick the candidates. 

for INSTALLER in *.run
do
    mktorrent \
    -a udp://zer0day.ch:1337/announce \
    -a udp://tracker.coppersurfer.tk:6969/announce \
    -a udp://tracker.opentrackr.org:1337/announce \
    -a udp://explodie.org:6969/announce \
    -a udp://tracker.torrent.eu.org:451/announce \
    -a udp://tracker.sktorrent.net:6969/announce \
    -a udp://tracker.openbittorrent.com:80/announce \
    $INSTALLER
done