fte: 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/fte - from package: fte

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