muscan: 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/muscan - from package: museekd

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

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