amavisd-status: 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/amavisd-status - from package: amavisd-new

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

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