srs2envtol: 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/srs2envtol - from package: python-srs

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

Error in other languages:
srs2envtol: bevel nie gevind nie
srs2envtol: comandă negăsită
srs2envtol: comando não encontrado
srs2envtol: commande introuvable
srs2envtol: command not found
srs2envtol: käsku ei ole
srs2envtol: không tìm thấy lệnh
srs2envtol: komanda nerasta
srs2envtol: Kommando nicht gefunden.
srs2envtol: kommandot finns inte
srs2envtol: komut yok
srs2envtol: nie znaleziono polecenia
srs2envtol: níor aimsíodh an t-ordú
srs2envtol: no se encontró la orden
srs2envtol: no s'ha trobat l'ordre
srs2envtol: opdracht niet gevonden
srs2envtol: parancs nem található
srs2envtol: perintah tidak ditemukan
srs2envtol: príkaz nenájdený
srs2envtol: příkaz nenalezen
srs2envtol: команда не найдена
srs2envtol: командата не е открита
srs2envtol: 命令找不到
srs2envtol: コマンドが見つかりません