spadesimp: 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/bin/spadesimp - from package: spark

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

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