lv2info: 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/lv2info - from package: lilv-utils

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

Error in other languages:
lv2info: bevel nie gevind nie
lv2info: comandă negăsită
lv2info: comando não encontrado
lv2info: commande introuvable
lv2info: command not found
lv2info: käsku ei ole
lv2info: không tìm thấy lệnh
lv2info: komanda nerasta
lv2info: Kommando nicht gefunden.
lv2info: kommandot finns inte
lv2info: komut yok
lv2info: nie znaleziono polecenia
lv2info: níor aimsíodh an t-ordú
lv2info: no se encontró la orden
lv2info: no s'ha trobat l'ordre
lv2info: opdracht niet gevonden
lv2info: parancs nem található
lv2info: perintah tidak ditemukan
lv2info: príkaz nenájdený
lv2info: příkaz nenalezen
lv2info: команда не найдена
lv2info: командата не е открита
lv2info: 命令找不到
lv2info: コマンドが見つかりません