closure-compiler: 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/closure-compiler - from package: closure-compiler

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

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