uget-gtk: 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/bin/uget-gtk - from package: uget

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

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