iodine-client-start: 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/iodine-client-start - from package: iodine

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

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