srg: 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/bin/srg - from package: srg

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