tes2cub: 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/lib/voxbo/bin/tes2cub - from package: voxbo

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

Error in other languages:
tes2cub: bevel nie gevind nie
tes2cub: comandă negăsită
tes2cub: comando não encontrado
tes2cub: commande introuvable
tes2cub: command not found
tes2cub: käsku ei ole
tes2cub: không tìm thấy lệnh
tes2cub: komanda nerasta
tes2cub: Kommando nicht gefunden.
tes2cub: kommandot finns inte
tes2cub: komut yok
tes2cub: nie znaleziono polecenia
tes2cub: níor aimsíodh an t-ordú
tes2cub: no se encontró la orden
tes2cub: no s'ha trobat l'ordre
tes2cub: opdracht niet gevonden
tes2cub: parancs nem található
tes2cub: perintah tidak ditemukan
tes2cub: príkaz nenájdený
tes2cub: příkaz nenalezen
tes2cub: команда не найдена
tes2cub: командата не е открита
tes2cub: 命令找不到
tes2cub: コマンドが見つかりません