chprop: 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/chprop - from package: karma-tools

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