p3scan: 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/sbin/p3scan - from package: p3scan

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

Error in other languages:
p3scan: bevel nie gevind nie
p3scan: comandă negăsită
p3scan: comando não encontrado
p3scan: commande introuvable
p3scan: command not found
p3scan: käsku ei ole
p3scan: không tìm thấy lệnh
p3scan: komanda nerasta
p3scan: Kommando nicht gefunden.
p3scan: kommandot finns inte
p3scan: komut yok
p3scan: nie znaleziono polecenia
p3scan: níor aimsíodh an t-ordú
p3scan: no se encontró la orden
p3scan: no s'ha trobat l'ordre
p3scan: opdracht niet gevonden
p3scan: parancs nem található
p3scan: perintah tidak ditemukan
p3scan: príkaz nenájdený
p3scan: příkaz nenalezen
p3scan: команда не найдена
p3scan: командата не е открита
p3scan: 命令找不到
p3scan: コマンドが見つかりません