fakenect: 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/fakenect - from package: libfreenect-bin

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

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