lfm: 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/lfm - from package: lfm

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

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