pdbtool: 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 CentOS possible default full paths are:

/usr/bin/pdbtool - from package: syslog-ng

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/pdbtool - from package: syslog-ng-core

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

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