The SeeThru Linux Client can simply be installed with a single command.
wget -O - https://seethru.app/linux | bash
Alternatively, this can also be added into cron to automatically get updates (the following updates at 1am every morning).
0 1 * * * wget -O - https://seethru.app/linux | bash
You can use https://crontab.guru to get a timecode for cron jobs.