smpif90: 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/smpif90 - from package: libsimgrid-dev

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

Error in other languages:
smpif90: bevel nie gevind nie
smpif90: comandă negăsită
smpif90: comando não encontrado
smpif90: commande introuvable
smpif90: command not found
smpif90: käsku ei ole
smpif90: không tìm thấy lệnh
smpif90: komanda nerasta
smpif90: Kommando nicht gefunden.
smpif90: kommandot finns inte
smpif90: komut yok
smpif90: nie znaleziono polecenia
smpif90: níor aimsíodh an t-ordú
smpif90: no se encontró la orden
smpif90: no s'ha trobat l'ordre
smpif90: opdracht niet gevonden
smpif90: parancs nem található
smpif90: perintah tidak ditemukan
smpif90: príkaz nenájdený
smpif90: příkaz nenalezen
smpif90: команда не найдена
smpif90: командата не е открита
smpif90: 命令找不到
smpif90: コマンドが見つかりません