uruk: 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:

/sbin/uruk - from package: uruk

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