srf_info: 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_info - from package: staden-io-lib-utils

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

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