pilot-dlpsh: 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-dlpsh - from package: pilot-link

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

On Debian possible default full paths are:

/usr/bin/pilot-dlpsh - from package: pilot-link

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

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