pilot-sync-plan: 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/pilot-sync-plan - from package: pilot-link-perl

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

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