libquicktime_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 Debian possible default full paths are:

/usr/bin/libquicktime_config - from package: quicktime-x11utils

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

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