qdbus: 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/lib64/qt5/bin/qdbus - from package: qt5-qttools
/usr/bin/qdbus - from package: qt
/usr/lib64/qt4/bin/qdbus - from package: qt
/usr/lib/qt4/bin/qdbus - from package: qt

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

On Debian possible default full paths are:

/usr/bin/qdbus - from package: qtchooser
/usr/lib/x86_64-linux-gnu/qt5/bin/qdbus - from package: qdbus-qt5
/usr/lib/x86_64-linux-gnu/qt4/bin/qdbus - from package: qdbus

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

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