fusiondirectory-shell: 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/fusiondirectory-shell - from package: fusiondirectory-webservice-shell

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

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