fusiondirectory-setup: 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/fusiondirectory-setup - from package: fusiondirectory

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

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