starpkg: 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/starpkg - from package: starplot

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

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