scm: 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/scm - from package: scm

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

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