geoclue-test-gui: 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 CentOS possible default full paths are:

/usr/bin/geoclue-test-gui - from package: geoclue-gui

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/geoclue-test-gui - from package: geoclue-examples

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

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