cl: 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/cl - from package: cl-launch

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