lv2bench: 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

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/lv2bench - from package: lilv-utils

You may install the required package with command apt-get install {package}
Error in other languages:
lv2bench: bevel nie gevind nie
lv2bench: comandă negăsită
lv2bench: comando não encontrado
lv2bench: commande introuvable
lv2bench: command not found
lv2bench: käsku ei ole
lv2bench: không tìm thấy lệnh
lv2bench: komanda nerasta
lv2bench: Kommando nicht gefunden.
lv2bench: kommandot finns inte
lv2bench: komut yok
lv2bench: nie znaleziono polecenia
lv2bench: níor aimsíodh an t-ordú
lv2bench: no se encontró la orden
lv2bench: no s'ha trobat l'ordre
lv2bench: opdracht niet gevonden
lv2bench: parancs nem található
lv2bench: perintah tidak ditemukan
lv2bench: príkaz nenájdený
lv2bench: příkaz nenalezen
lv2bench: команда не найдена
lv2bench: командата не е открита
lv2bench: 命令找不到
lv2bench: コマンドが見つかりません