rlfe: 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/rlfe - from package: rlfe

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

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