ghostess: 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/ghostess - from package: ghostess

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

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