softflowd: 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/sbin/softflowd - from package: softflowd

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