pyscrabble-server: 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/sbin/pyscrabble-server - from package: pyscrabble-server

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

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