fbpager: 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/fbpager - from package: fbpager

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

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