ssr: 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/ssr - from package: soundscaperenderer-common

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

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