pilot-install-todo: 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-install-todo - 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-install-todo - from package: pilot-link

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

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