kpilot: command not found

Have You tried accessing the binary with the full path?

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/kpilot - from package: kdepim

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