softflowctl: 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/softflowctl - from package: softflowd

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