diodshowmount: 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/diodshowmount - from package: diod

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

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