js_beautify: 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/js_beautify - from package: libjavascript-beautifier-perl

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

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