desktopnova-daemon: 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/desktopnova-daemon - from package: desktopnova

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