qd-config: 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/qd-config - from package: qd-devel

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

On Debian possible default full paths are:

/usr/bin/qd-config - from package: libqd-dev

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

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