cm: 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/cm - from package: config-manager

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

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