s2r: 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/s2r - from package: alliance

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

Error in other languages:
s2r: bevel nie gevind nie
s2r: comandă negăsită
s2r: comando não encontrado
s2r: commande introuvable
s2r: command not found
s2r: käsku ei ole
s2r: không tìm thấy lệnh
s2r: komanda nerasta
s2r: Kommando nicht gefunden.
s2r: kommandot finns inte
s2r: komut yok
s2r: nie znaleziono polecenia
s2r: níor aimsíodh an t-ordú
s2r: no se encontró la orden
s2r: no s'ha trobat l'ordre
s2r: opdracht niet gevonden
s2r: parancs nem található
s2r: perintah tidak ditemukan
s2r: príkaz nenájdený
s2r: příkaz nenalezen
s2r: команда не найдена
s2r: командата не е открита
s2r: 命令找不到
s2r: コマンドが見つかりません