gdm-emulatord: 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/sbin/gdm-emulatord - from package: kdm-gdmcompat

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

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