gpilotd-control-applet: 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 CentOS possible default full paths are:

/usr/bin/gpilotd-control-applet - from package: gnome-pilot

You may install the required package with command yum install {package}

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