urlscan: 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/urlscan - from package: urlscan

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

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