scontrol: 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/scontrol - from package: slurm-client

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

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