paw-demos: 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/paw-demos - from package: paw-demos

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