srf_list: 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/srf_list - from package: staden-io-lib-utils

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

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