qtrechunk: 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/qtrechunk - from package: quicktime-utils

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

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