genbox: command not found

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/genbox - from package: gromacs

You may install the required package with command apt-get install {package}

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