qtscrob: 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/qtscrob - from package: qtscrob

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

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