fbautostart: 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 Debian possible default full paths are:

/usr/bin/fbautostart - from package: fbautostart

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