freenect-cppview: 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/freenect-cppview - from package: libfreenect-bin

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

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