fbterm: 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/fbterm - from package: fbterm

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/fbterm - from package: fbterm

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

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