yaz-url: 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/yaz-url - from package: yaz

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

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