tempest_for_eliza: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/tempest_for_eliza - from package: tempest-for-eliza

You may install the required package with command apt-get install {package}
Error in other languages:
tempest_for_eliza: bevel nie gevind nie
tempest_for_eliza: comandă negăsită
tempest_for_eliza: comando não encontrado
tempest_for_eliza: commande introuvable
tempest_for_eliza: command not found
tempest_for_eliza: käsku ei ole
tempest_for_eliza: không tìm thấy lệnh
tempest_for_eliza: komanda nerasta
tempest_for_eliza: Kommando nicht gefunden.
tempest_for_eliza: kommandot finns inte
tempest_for_eliza: komut yok
tempest_for_eliza: nie znaleziono polecenia
tempest_for_eliza: níor aimsíodh an t-ordú
tempest_for_eliza: no se encontró la orden
tempest_for_eliza: no s'ha trobat l'ordre
tempest_for_eliza: opdracht niet gevonden
tempest_for_eliza: parancs nem található
tempest_for_eliza: perintah tidak ditemukan
tempest_for_eliza: príkaz nenájdený
tempest_for_eliza: příkaz nenalezen
tempest_for_eliza: команда не найдена
tempest_for_eliza: командата не е открита
tempest_for_eliza: 命令找不到
tempest_for_eliza: コマンドが見つかりません