smpirun: 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/smpirun - from package: libsimgrid-dev

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

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