srsd: 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/srsd - from package: srs

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

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