smokeping: 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/smokeping - from package: smokeping

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

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