epydoc: 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 CentOS possible default full paths are:

/usr/bin/epydoc - from package: epydoc

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

On Debian possible default full paths are:

/usr/bin/epydoc - from package: python-epydoc

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