catalog_update.inc: 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/share/ampache/www/bin/catalog_update.inc - from package: ampache-common

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

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