sparksimp: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/sparksimp - from package: spark

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