fbcat: 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/bin/fbcat - from package: fbcat

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

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