pushpin-handler: 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/pushpin-handler - from package: pushpin

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

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