gozilla: 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/gozilla - from package: global

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