pydoctor: 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/pydoctor - from package: python-pydoctor

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

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