sctest: 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/sctest - from package: libemu2

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

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