ptdump: 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/lib/cyrus/bin/ptdump - from package: cyrus-common
/usr/bin/ptdump - from package: python-tables

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

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