podebconf-display-po: command not found

Have You tried accessing the binary with the full path?

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/podebconf-display-po - from package: po-debconf

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