ratpoints: 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/ratpoints - from package: ratpoints

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

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