gmorgan: command not found

Have You tried accessing the binary with the full path?

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/gmorgan - from package: gmorgan

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