quickplot: 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/quickplot - from package: quickplot

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

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