carmetal: 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/carmetal - from package: carmetal

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