poldi-ctrl: 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/poldi-ctrl - from package: libpam-poldi

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

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