fl-run-bench: 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/fl-run-bench - from package: funkload

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

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