libpreludedb-config: 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/libpreludedb-config - from package: libpreludedb-dev

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

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