scrollz: 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/scrollz - from package: scrollz

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

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