preload: 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 Debian possible default full paths are:

/usr/sbin/preload - from package: preload

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

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