apt-clone: 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/apt-clone - from package: apt-clone

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

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