gracket: 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/gracket - from package: racket

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

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