rbeautify: 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/rbeautify - from package: ruby-beautify

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

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