pgdbf: 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/pgdbf - from package: pgdbf

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

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